92 Ford E350 steering problems

I have a 24 foot MH on a 1997 E350, and when I purchased it I had new tires all around. The place where I bought the tires set all the pressures at 72 psi, and it wandered all over the road. After some research and input from people on this forum, I weighed my camper (fully loaded) and adjusted my tire pressures to 62 psi, and the handling improved dramatically. I also tried to move as much weight as possible as far forward as possible, since the rear axle was close to maximum weight while the front was not. I was going to go to new shocks and alignment next, but there was no need. It is very comfortable to drive now, has little reaction to passing semis, and is much more stable in crosswinds.