OK this is based on the Hawaiian technique most people know, with a few twists to allow it to work from the sand. An elevated position will still help though. This is an untested idea, but I have high hopes for it and want your opinions as to whether it will work or not. I want an effective method that doesn't require a kayak for situations where the kayak is not suited, rough seas and fishing spots that are a long walk from the road spring to mind. With this method the only additional item you need to carry is a telescopic pole (more on this in a moment), which packs down to an easily carried size and weight.
So...
What you need for this is:
One 12' surf rod or the longest farthest casting rod you can find
A suitable spider weight
One 30 feet long telescopic extension pole (the type used for window cleaning and removing snow from roofs)
One V shaped something or other to fix into the top of the pole (this holds the 'pilot' line up)
One roller tip top
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Those are the basic ingredients, here is the method:
1. Tape the roller tip top to the end of your surf rod. When you run the line through the guides, also run it through the tip top.
2. Attach spider weight to the line on your surf rod.
3. Cast to the desired spot, or as far as you can, whichever works and set the weight so the line is tight.
5. Detach the roller tip top from the rod so it slides/rolls freely on the line (but don't let it slide down!).
6. Attach your bait and weight (which is on a separate line on your shark rod) to the roller tip top - I'm thinking a shallow blunt hook soldered/glued onto it which you hang your hook and weight on, open to suggestions on this.
4. Extend your pole (that's what she said) 
And place the line from the surf rod in the V shaped receptacle at the top of the pole.
6. Raise the pole, lifting the 'pilot' line and attached bait 30 feet up in the air. Plant the pole in the sand and have someone hold it in place, keeping the pilot line tight while you control the line on your shark rod and stop the bait from sliding down the line until you're in position.
7. Once you've got the bait up as high as you can, start to let the line out from your shark reel and watch your bait slide down the 'pilot' line on the tip-top roller and out into deep water where the sharks are...
8. Give your line a sharp tug to pull your weights off the carrier hook and into position on the bottom.
9. Reel in your 'pilot' line on the surf rod, taking care to reel in at an angle to avoid dragging in your bait that's on the other line.
10. Catch a shark.
What could be simpler? 
I'm thinking you could get out a good 100yds plus using this method, depending on how well you can cast.
Anyone think this exceedingly cunning plan might work? 
There is one problem with that: East winds.
There is a rigging called "Charlie rig" where you cast the weight then slide down your bait, this is usually used from piers, or in my case, from my 15ft surf rod. Either way, high seas and east winds will push your bait back, so...
The reason for the tip top roller is to allow the bait to slide down as freely as possible, so unless the wind is very strong it should slide down OK I'm thinking. It would certainly be more challenging with a high wind though.
In reality, the weight of the bait will create a triangle belly, where will touch the water closer from the beach, then would be without a bait on in straight line. That's where the problem is - if high seas, the bait will get pushed back when hits the water, if high east winds, it will not slide down - unless you put a bigger bait - but by doing that, the sliding distance is way closer then initially thought.
Your way would work the best if no winds nor ruff seas would be in place or towards-west winds, but in ruff weather... the physics kicks in.
Yes, I see what you're saying. I guess every method has some drawbacks. Do you think given the right conditions it could work though?
Of course, why do you think i have a crazy 15ft surf rod? I love using that rod to cast long shark wire leader or sliding down the bait similar to your situation.
Actually, now that you mentioned that, i got higher hookup rate from a beach surf fishing by using that sliding method then fishing in one spot on the bottom, using ONLY live bait. The bait goes up and down the line, and man - that thing gets hit even in very slow days. This is also my favorite style to fish from the beach with live bait, but not for sharks. For shark i cast that on the bottom.
So far my biggest hookup on this 15ft daiwa surf rod was a loggerhead turtle the size of a jet ski from a pier.
Maybe a spider weight with really stiff legs would hold bottom a little better. Then on the surf rod run all braided line. You will be able to cast farther with braid and will have very little stretch which will minimize the belly in the line. With the braided line, the spider weight with stiff legs (have to let it sit for a bit to bite well) and the extra height of the telescoping pole you could probably get a decent sized bait out a fair distance.
Here are some pics with that rod when i hooked a BT in spring:
sounds like what we use for kings over here minus the 30ft pole.
That's a trolly rig with a bigger pole??
Yeah basically. But designed to optimise distance from a beach. I will try it out soon and let you know if it works!
like shawn and stevenj407 said thats pretty much a trolly rig but instead of using that of a pier the 30 ft pole gives ur line the hieght off the water
like shawn and stevenj407 said thats pretty much a trolly rig but instead of using that of a pier the 30 ft pole gives ur line the hieght off the water
Exactly, so that plus the roller should get good results.
So what kind of distance can you get with the trolley rig off a pier?
Boghy, I think you are referring to a trolly rig, Dan you have a good concept going there, but like all things, "it is easier said than done", holding that 30ft rod without swaying is going to be one issue, another is getting a spider weight to hold more weight while in the sand than the size of the bait you are deploying with possible bite-away weight for rough conditions, you do have a chance at those sharks if you can get your line past the sandbar, so I'm sure you can be an innovator and make it work, but keep on keepin' on and eventually you will create something or learn something in the end.
This reminds me of the time I invented makeshift bridge clips for shark fishing a bridge where you are not allowed to fish on top of it. It only takes a little imagination and a bit of know-how and you can do anything you dream of.
Just an average fisherman.
I'm not sure if this is a trolling rig or not, since i don't have any experience for offshore fishing, but here in my area, when fishing from a pier, people name "Charlie rig" the rig where they tie the mono line straight to a pyramid sinker, they cast that without a bait as far as they can, then use a 2-3ft long mono leader with a live bait at one end then a snap-swivel to the other end where they snap that swivel with the live bait on, on the already casted line, and the bait slides down, nicely then the bait swims up and down the line till gets nailed.