I use a 6 x 12 "TILT" utility trailer. At my request, the bed was made of expanded metal vs. wood and I don't have a rear ramp or rack, it's lighter this way. It was manufactured for me by Anderson Trailers in Ga.
http://andersontrailers.com/ I've had it for over a year and I've towed my :spyder2: to several events in different states, hundreds of miles away. The tilt capability makes it very easy to load, and I don't have to have a ramp, or ramps with it, (so there is less air drag) just strap the bike down. I am very happy with it. I will load pictures if I can figure out how to do it.