We tow a 2015 Rockwood Signature Ultra Light 8312SS, max weight of 8900 lbs, and length a tick under 35 foot. We pull it with a 2002 Ford Excursion, 7.3L Power Stroke. The truck has plenty of power to pull the rig. The suspension is a little sloppy, and transmission hunts a little on the hills. This is our second trailer and is much larger and heavier than the previous trailer.
I just ordered performance upgrades to help the truck out. Air intake, gauges, exhaust and chip. After that comes the airbags to stiffen up the rear when the trailer is on the hitch. I currently get 9-10 mpg pulling the trailer. Sometimes I wish I had a truck bed to haul the messy stuff, but it sure is nice not hearing the kids messing with each other. The both have their own bench seat to themselves. Not to mention the look on the peoples faces when the see an Excursion but hear the loveable rattle of the 7.3. Throws them for a loop every time.