I've been using a 9.5ft X 6.5 ft Echo ATV trailer for about 5 years for a 14 ft. cataract and now a 14 ft raft. Works great. My friend who helped me find the trailer had stake pockets welded on the frame and had 2 foot high panels with metal mesh built for it. There are 6 panels total so they aren't super heavy for me to put in place when I want to haul cargo. Most of the time I haul my raft inflated, rigged & ready. I haven't added a roller to it but it's never been a problem, as the lights are all sealed and I can back into the water to float the raft on & off. 13 inch tires. I've trailered my raft & gear all over Utah & Idaho with no issues on the highway or off road.
"We are all visitors to this time, this place. We are just passing through. Our purpose here is to observe, to learn, to grow, to love....and then we return home."
Australian Aboriginal Proverb