Ditto on that most parks, CG's do not allow motorized bikes.
I traveled with some people that had those small electric bikes. The DH had some physical disabilities that prohibited him from walking long distances. His electric bike had three wheels i.e. trike and the DW had the 2 wheel one. This enabled both of them to get out of the RV everyday and enjoy the outdoors. They run around 200 less if you find them on ebay.
I have a regular bike I carry with me in the RV and I am thinking of replacing it with one of those electric scooters. Keep in mind though that they are not as light as you would think. My senior friends did have difficulty lifting them to put inside the MH.