I've found that adjusting the rear air bag pressure so the coach sits level front to rear and side to side will give you the best handling. I used to have too much air in the rear and the MH would wonder down the road.
Find a flat level driveway to find the correct set up for your rig.
Everyone will have different amounts of air depending on their particular load, so no set numbers.
'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
2000 Honda Accord