You can choose any route you want as long as you present yourself and a boat at checkpoints. There are three of them on the Everglades Challenge cource. All checkpoints are located in such way that fast boat should slow down somewhat. It didn't work with Steve and Jamie. <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />

Multuhulls were always present in the Challenge and I doubt they ever be banned.