aeroshots: You're close on the 5K weight, close enough to not worry about it. We had the same rig and I think with the Jeep on there you're actually about 5,600#. Again, certainly not far enough over the hitch capacity to be an issue. I've noticed some folks on here take all the "numbers" provided to them as being exact instead of common sense guidelines. (I'll probably be hearing from several over that comment!)
Am sort of curious why you put the Jeep on the hauler when they're so easy to flat tow. When I bought my Jeep, I sold the trailer and love the flat towing. I think all the requirements on some of the other vehicles would drive me nuts, but the Jeep was a breeze.
One other question for you: When you logged the 11.0 MPG, what mode were you in on your transmission? Last trip I made (our first), I think I had it in normal mode (the red light was off). I was reading something the other day about using economy mode (red light on?) when pulling. Thoughts of suggestions? I was getting just over 10.0 MPG but we went through the mountains of north GA and east TN, too (Orlando to Gatlinburg).
2015 Legacy SR340 360RB
2014 Jeep Wrangler Unlimited Toad
Gigi, Poppy and Sadie Lady...On the road, but not full time!