I've gone before when I wasn't able to ride and it can still be a lot of fun if the people you go with are fun. I've been more DL'd by law school though than anything else though. I let a select few (2) of my buddies take the boat out without me. I figure that I'm so blessed to have a boat and those two guys have made having it even better, that I would be ungrateful not to let them enjoy it without me.
(These are the type of stand up guys who help with maintenance if something goes wrong without my asking and bring chicas without my asking.