Man. After looking at craigslist, I'm not really liking the look of the trailers for the money. So if I trailer, I'll build a bare bones one from harbor freight.
Alexi
I bought a Harbor freight trailer several years ago, just for hauling bikes. I didn't want to spend a fortune for something that would likely only get used a few days a year. I also had to figure out what the hell to do with a trailer all those other days of the year that it wasn't being used. So I bought
THIS FOLDING TRAILER. It has a decent weight capacity...not enough to haul TWO FJRs, but two less stout bikes or one FJR with ease. It has 12" wheels instead of the weenie 8 inchers, so handles the highway well enough, and I'm one of those people that thinks speed limits are just friendly suggestions. I added a plywood deck and Pop-Chock hardware in three locations, so I can haul one bike in the center, or two bikes side by side. Using the Pop-Chocks means I don't have to unbolt wheel chocks from the deck to be able to fold and store it. It sits up against a wall in my garage and most people who are in there don't even realize there's a trailer there at all. So it hardly takes up any space when not in use. I can set it up and be ready to roll in about 15 minutes. I already had a loading ramp, so I can just throw that in the back of my truck, or strap it to the trailer.
Since 4' x 8' really doesn't give you enough width to securley tie down two bikes side by side, I bolted a pretty stout piece of angle iron across the front of the trailer that sticks out a foot on each side of the deck and added eye-bolts at the ends and in the middle. It doesn't stick out any farther than the wheels and fenders, so it doesn't increase the overall width of the trailer. I hauled my R1 and a ZX-12 side by side (1000 lbs combined) down to Deal's Gap and back with it...about 750 miles round trip with nary an issue. It also hauled my 800 pound (!) VTX1800 to Tampa and back which was 2k miles round trip, also with no problems.
I caught the trailer on sale and I think my total investment is just a tick under 500 bucks including plywood, hardware, pop-chocks, and a spare tire. I've loaned it to friends to haul their bikes as well and it hasn't let anybody down yet. I can say with confidence that I've gotten my money's worth out of it. And since it stores indoors instead of out, it still looks pretty new in spite of the thousands of miles it's traveled. I could be wrong, but it seems to me like it would fit your bill really well for all the same reasons it fits mine.
Or, since we were talking of Harbor Freight, how about this one here:
Problem with that one is depending on how high your trailer hitch is, sometimes the angle of the drop-gate is steep enough that you drag your exhaust or lower fairing as you go over the high spot...not pretty.
Just my $.02