Paul-
<br>I have used pieces of plywood before (store between the hulls flat on trailer, seal before use so won't warp (too bad!) or get heavy) and also made some wooden supports by taking 10' long pieces of 2x4's (2 or three), cover the last 2-3 feet of each end with carpet and screwed on "feet"- basically used @ 2' pieces of 1x4 either at ends or in middle (to keep from "rolling" as slide boat on/off). Put one at water's edge, another (or 2) further up beach, pull boat up onto to rig/launch. Put your name/boat number on (can "rope" together also to keep spaced and altogether if want) and seal wood too. Carried on trailer between hulls, lashed down.
<br>Hope this helps!
<br>
<br>Kirt<br><br>Kirt Simmons
<br>Taipan #159, "A" cat US 48