I pull our RW 2703WS with a 2011 F150 EB. It has 3.55 rear with tow package and AIRLIFT 5000 airbags. I have the E-4 WDH. The truck has over 140,000 miles and we just returned from a 1200 mile trip. There were times on the interstates that I did forget I was towing but I was quickly reminded when semis came past me. I stayed at 65ph and averaged 10mpg. We went from Central MD up to the PA turnpike then over to Indiana and then returned. I was in cruise whenever possible. On hills the truck would shift to 5th and stay there. I would occasionally get on the gas to get it to shift to 4th on a couple of hills but I had no problem staying at 60-65. Downhills were no issue. I use the tekonsha P3 brake controller which is fantastic. I also have 503 TPMS system for the trailer tires.
This was our longest trip and I am now very confident in the set-up.
2016 Rockwood 2703WS Sapphire
2011 F150 Ecoboost SCAB/3.55