the guys that owned my raft before me bought one of these
trailers, put a floor and 8" walls on it, and then put a deck on top of those walls. they put a door on the back. the raft sits on the deck. oars, blades, pfd's, boat bag, etc., go in the space between the deck and trailer frame. it's pretty handy. i thought i'd modify it to make the walls about 20" so that i could haul the cooler, drybox, etc., under the raft to keep the truck bed free. not gonna do that.
the trailer isn't super heavy duty, but that's not its intended purpose. it's light, is super easy to back up to the ramp, and serves its intended purpose well.