Hi,
We have a 2002 LTV Freedom 2a on the 3500 Dodge chassis, and while we have limited experience on dirt roads, we find ours handles best with the air lifts at 30 to 40 psi, and the tires at 65 psi front and 80 psi rear. If the roads you are travelling are very rough, I would think you may be bottoming the spring travel if you have the air bags at low pressure. With the air bags at 30 --40 lb psi the ride is firm.
At lower air bag pressures handling is very poor with considerable side to side rolling and difficult steering. We also have the wheel spacers on the rear to make the rear tread width the same as the front, and that has helped handling some. These are heavy vehicles at best, and it is very easy to load them beyond their design limit. I suggest you get the unit weighed loaded as you plan to travel and check the weights against the listed load limits. We try to travel light----it's very easy to take more stuff than you need. Most class B units have a limited payload as the coach additions put the chassis close to the design weight limits.
