+1 for the Tow Dolly. I went with the dolly so I wasn't stuck with just one vehicle to tow behind the motorhome. We have different vehicles we like to use depending on where we are heading.
There is a company out there that makes a tow dolly that has a platform on the front of the dolly so that you can haul your motorcycle with you. I have been looking into it but it's pretty expensive.
RV Towing Accessories | RV Trailers, Tow Behind Trailers, Motorcycle Trailers and Tow Dollies for sale
When we take our goldwing with us we have a enclosed trailer we use.