We usually get between 38-42 mpg when towing the Escapade.
We don't ride any different with the trailer than without, which is to say if everyone is running 75, then I run 75, too. I usually get in excess of 40 mpg when running a straight up 70 mph. The CUSE has no problem pulling or passing under load. As a matter of fact, the acceleration is really impressive when passing. The guys on the stock Ultras can't begin to keep up with me and my trailer loaded with their gear. And with the swivel hitch you can still drag the footboards in the parking lot while pulling the trailer!
As for the B/O '07...yes, I'll be selling her. I like to trade every two years to keep under warranty, but I like the changes to the '08: ABS, Brembo brakes, keyless remote, isolated drive system sounds interesting, hard tour pak, noise fix for 5th gear, 6 gallon tank, elimination of throttle cable, standard wind deflectors, special granite and chrome on engine, etc... The paint schemes and colors just seem to be lacking.