U-Hauls are cool little trailers, and sturdier than many because they were designed to be used as rentals. They do have a few idiosyncrasies, including some non-standard components intended to prevent theft. I believe there is a Facebook page just for U-Haul
owners, which is a good place for specialized information.
As to full-timing, there is a whole sub-forum dedicated to full-timing issues. You might want to scroll through some of the old threads there. You'll find answers to questions you never thought to ask!