You can't find the gougeon plans, each set was custom engineered to specifics. Mostly a mater of adjusting the number and lay of the tapes.
One of the things that has to be accounted for over time is that the accepted dimensions for spars have grown enormously. There are a lot of things that can be efficiently done in wood if you have certain objectives. But at some point you cross over into a land where carbon is the main solution. Given that carbon can make a spar that doesn't required any stays, and at relatively modest wall thickness's, one is really pushing some wood if one requires carbon on a wide stayed boat like a trimaran, in a fat section spar like a wingmast.
Is this spar for one of Richard's little tris? Seems oneought to be able to make that relatively easily out of wood. In my world of whimp sailing, I don't really understand the size of rigs on trailerable tris. They maintain similar proportions to much larger tris where the righting moment increases much faster than the rig area. if it is 17 or 18 feet long it ought to be good with a 20 foot , and the construction need not be huge.
I would recommend looking on the Yahoo group for trems, where like a decade ago they posted the specs for a trem gougeon spar.
At one point gold coast did a lot of spars in 1/2 softewood with 10 oz each side. Run that thought the computer and see how heavy it works out, then adjust given that the scantlings are for much bigger boats.
In the 30th anniversary issue of Epoxyworks, or thereabouts, there was a fairly detailed review of the new mast on Ollie, Meade's boat. It was significantly changed from the earlier versions of Gougeon spar that it essentially rejected.
The specs for the Wharram spars are online. They run fairly heavy as they do not use diamond wires. I would guess one could probably squish the circles into aero shapes, use strip and glass and make some weight savings for a stick with diamond wires.
One of the best deals out there for a small boat is Bernt's batwing rig for his trailerable cat. Very interesting rig that is designed to be extremely easy to raise.
Another interesting one, but unproven is Ruel Parker's rig for his Conch design, I think it is called.
I think that having a rig for trailering, and a rig for the club makes a certain amount of sense. Usually the sky scraper rigs are overkill for cruising, depending on your weather, and there is something to be said for simple rigs that can be hoisted without a lot of rigging. Both Newick and White have used the traditional and tech rig approach on the same boat. Newick designed B2 to use a lug or a fractional.