This is an old post, but I wanted to update you regarding loading a Wing on a Kendon Dual Rail Trailer.
I just completed a 240 mile trip with a Goldwing on a Kendon dual rail trailer.
All went VERY well

. The kendon trailer handled the Goldwing very well over bumps, hills and grades. Loading and unloading can be done by one person (my wife could only watch and help with the strapping).
I used the optional center rail, and added an additional bracket under the diamond bar to secure the rail to the main center post. Kendon should have provided this 2 dollar EMI bracket as part of the kit.
To load the Goldwing, I used the engine’s power and walked the bike up. I found that I could stop, just before I placed the front tire into the wheel chock for final alignment. The only way to align the front wheel with the rail is if your standing to the side, looking down. My engine stopped once, but since your bike rests on the trailer at this point, there was no issue about it coasting back.
For the record, if you don't use the optional center rail, but used the standard outboard rails, loading and unloading would be even easier. The stock rails have longer guide bars, and there's no tie down bracket to navigate around.
The kendon trailer is very nice! It took the bumps better than my vehicle!
The only issue now is that I used a $29 bike cover to protect the wing from the elements, but while trailing at speeds of 65mph and with outside winds at 30-45 mph, the cover became a cape. I took the cover off.
I received several thumbs up :yes1: from several people, 06 wing on a 07 kendon!
By the way, we parked about 90 miles from our Galveston destination, and went on a ferry ride (wing on a boat).
Here's a pic: