Boatahome??
No room for a boat when RV-ing? Then maybe you need a Boatahome. It's an RV, no wait, it's a boat, no wait, it's just too weird. Sales pitch vid here. I so want one - NOT!
Forum Discussion
Why not just get a boat with a cabin? Leave it one the trailer and use it at the campsite like an RV. Then when you are ready to go in the water, pull it in. No different than sitting at a dock, whether wet or dry.