Oh, the horror!!! ;-)) I wouldn't tow my Goldwing very far at all with a Slick Willy hitch-mount setup. It may be fine for a local transfer of the bike from one part of town to another, but the bike would collect a LOT of road dings and be "sandblasted" on a longer trip, especially behind a moho! I would think the previous poster's suggestion would hold more merit except that it would leave the bike open to road damage (rocks, debris, etc.), wouldn't it? My own 2006 gold 'Wing rides in an enclosed trailer and that would be my advice. It might fit in just a 5'x8' enclosed trailer although mine goes in a 6'x12', and I think there are 6'x10's.
"Road Ranger" (Lenny!) RCMPolice Veteran #25XXX
2012 Open Range 386FLR 5'ver towed by (TBD)