+1 on the Uni-Go. I have over 12,000 miles on my Uni-Go, all pulled with the ST. In my opinion it is THE trailer to buy. I know it is pricey, but I don't regret buying it at all. If the trailer is loaded correctly (with most of the weight low and forward) this trailer pulls like a dream. Mac is correct about the dirty air of large trucks. I just approach slowly, then accelerate past. The trailer doesn't start to wiggle during moderate acceleration. I'm past the truck by the time I roll off some and no wiggle. Not too much of a problem as we ride very little slab.
I pulled it at a sustained, GPS indicated 100-110 mph coming back from Big Bend a few weeks ago. No traffic, clean air.
I have also pulled it thru the Dragon's Tail and got some pretty amazing stares. This trailer throw from side to side right along with the bike and you won't know it's there, except for a little more weighty feel during acceleration and deceleration.
PM me if you would like any other info about the Uni-Go.
PS - I will have it at Moonshine. If you are going, you can take an up close look.