Martin,
We have what is known as an HDT to vehicle. It's a retired semi that has been converted to tow an RV and is registered as a motorhome in Montana. On the back of the HDT is a Rampage Ramp.
http://www.rampagelift.com/
This is a one person lift ramp and is mounted cross wise on the back deck in front of the trailer. It is rated up to a Goldwing for load. I have had it for going on 5+ years and it allows us to have the bike with us. Since we are full timers and have no fixed home we have to take everything with us.