Suspension upgrades could be springs, shocks or stabilizer bars. Since you have already done something of these things, it would b best to wait until you have the camper loaded and then see if additional changes are required.
Look for older posts from me. I had the Vision rims on my 2005 F250. Typically my rear axle weight was 7000 lbs with just the camper and around 8000 lbs with camper and trailer. I ran that setup until late 2014 when I upgraded the truck for my current camper. I am on my phone find it too difficult to post searches and links until I am back on a computer.