We tow a 2014 Ford Explorer @ 5200 lbs behind basically the same coach (31' Winnebago). It tows fine, yes I'm at the limit with my tow capacity and hitch but over 8K miles so far with zero issues. Slow up hills, but honestly only a few MPH than when not towing. I lose about .5 MPG when towing, unless a lot of hills, then closer to 1- 1.2 MPG. Good Luck!
EDIT:
I personally don't "think" going lighter will make much of a difference. These MH's cut such a big hole in the air...that's your drag, towing 1,000 lbs difference won't make a huge gain. Again, that's only my opinion.
