My wife and I both have 50cc scooters and we have a bumper pull trailer. We haul the scooters in the bed of my truck. I know this doesn't address your issue with your motorhome, but just wanted to report that we love to use our scooters when we camp. You have to check different states' laws, however, because some require that you have a license. Nevada's laws are the same as yours, but, for example, we had to buy temporary licences in OR when we went camping there. Also, helmet laws are different in various states, and you need to check that out also.
TT: 2012 Surveyor SV-301
TV: F250 6.4L Diesel-CC