As I see it, an electric-assist bike or scooter, or even a gasoline-powered scooter or small motorcycle is meeting a small portion of a much bigger need. I think they are a great enhancement to a tiny motor home (like a class "B") that you would normally get around in all the time. But if you have a standard class B+/C or class A motorhome, seeking an alternative to breaking camp daily, then a tow vehicle is really your only practical solution.
Our class B+
SEEN HERE IN DETAIL is on the small side of "standard" at 23'-8" long and we have a tow vehicle. We used to tow a 2-seat sports car (a 2000 Toyota MR2 Spyder) but changed to a 4x4 Jeep Liberty because the MR2 was unable to handle severely primitive roads to remote trail heads and other sight-seeing excursions. There are many times we miss the MR2, but the Liberty is the all-encompassing solution. The bonus with the Liberty is having a place to carry extra, from golf clubs to bicycles.
I had my reservations when first contemplated towing another vehicle. But doing so for 14 years now, it has become second-nature. I am happy to do it for the benefits and conveniences it provides. Towing is not all roses, but for me and my wife, the benefits far out-weigh it's complexities.