What about this, cover the trailer with plywood, add foam to where the hulls will rest, thus making it like a flatbed type trailer, so the hull is supported along its full length rather than just at two points, front and rear?
Would maybe work if the hulls were flat bottomed. The bottom of my Stealth has quite a lot of rocker front to back so I'm not sure it's a good idea: it will probably end up with one pressure point in the middle instead of a constant equal pressure all around. You can do that with a Wave or a Nacra 500 maybe, but it doesn't seems like a good idea for my boat.
