I'm not really for more government, but I think some of the RV dealers could offer some training classes (starting with their own sales reps) to teach basic skills for the RVs, include things like air brakes for those big DPs, turning radius, backing, safety checks, etc.
A coworker friend bought a big DP a few years back, both him and his wife took classes on driving it, backing up, connecting TOAD, etc . He said they would have had serious issues had they not taken the classes. They traveled all over the US, including both coasts and Alaska before selling it and getting bumper pull trailer.