Yes you will like the anti-sway bar once it is attached. How large of diameter? I think that my 1975 F-350 Supercab had a factory 1-1/4" bar, and they come in 1.5" too.
I also had a steering stabilizer, it hooks to the frame and steering rod, and dampens any road vibrations, so it steers easier, especially nice in cross winds.
I probably would not put 75 PSI into the air bags, but if you like a really solid ride, go for it. . . What is their max rating? I would stay about 25% less than the max rating, for bag longevity.
Tires. Soft sidewall tires can effect handling. I changed the tires on the back of my class A motorhome from firm all steel sidewall Michelin tires to softer polyester sidewall Goodyears. I had to change to all steel goodyears within 400 miles because handling was so poor. At least I hope that you are running 90 PSI in your tires while you have such a heavy load on them.
Have you checked your rear axle weight? I was surprised to find that mine was close to the tire weight rating.
AS for my first trip, I figured the Grand Canyon was out in the desert, so it must be warm, and Thanksgiving weekend 1987 would make a 'wonderful' trial trip. Well my first camper did not have a furnace, but had 4 burner stove and a oven. Only 1 group 24 coach battery + group 27 engine battery. It was cold. And so foggy that I could not see into the canyon. Ice was about 1/2" thick on all the roads, but going from Williams, I figured if that MCI Greyhound bus can make it, so could I.
I did slide a bit in the icy Grand Canyon south rim parking lot, after stopping, with my foot on the brake, I started moving downhill.. But I managed to park OK, and did fine.
On the way out, I was following a water delivery truck (they trucked in drinking water back then to the Grand Canyon, not drilling wells within the park boundarys). My buddy said 'that truck stinks diesel fumes' so I was back about 1,000 feet. A car passed me, and got into the ditch when it slide from the passing lane all the way across the road into the ditch as a car approached.
Now I check the Weather.com for reports before going anywhere. . . I want to know I can use my swimsuit before leaving.
I just checked weather.com and here it will stay just above 33, so I am good going to work today and tomorrow. Friday looks good too.
Have a great time camping!
Fred.
Money can't buy happiness but somehow it's more comfortable to cry in a
Porsche or Country Coach!
If there's a WILL, I want to be in it!
I havn't been everywhere, but it's on my list.
Kangen.com Alkaline waterEscapees.com