My TV is a 2004 F150 FX4 and our TT is a Passport 3220BH that weights in right around 7500lbs and a TW of 950 lbs, my hitch is the Reese dual cam with 1200 lb bars. If my truck was stock, when loaded for camping, the rear would be about .5" higher than the front, but I put a leveling kit in the front to raise it 2.5", which is fine until I haul or tow something then the rear end squats and it looks horrible IMO. I ran a D range tire and now an E range (to get the size I wanted) and I installed Firestone Ride-Rite bags to level the truck back out when hauling or towing. For normal driving I run 10 psi in the bags, with the camping hooked up truck bed loaded with the normal items I run 35 psi and this levels the truck back out. My setup feels rock solid going down the road, even when passing or getting passed my semis, no loose feeling at all.
Two things that I would do and should make a huge difference, get 1400 lb bars or completely new 1400 lb hitch setup and also up grade to LT tires.
TT-2013 Passport 3220BH
TV-2004 F150 FX4, not exactly stock...
with 2001 Kodiak K215: 2010-10, 2011-12
with 2012 Grey Wolf 26BH: 2012-19, 2013-24, 2014-11, 2015-6
with 2013 Passport: 2015-13, 2016-15 booked