Kathy,
Sure sounds like shocks as bad ones will cause the bouncing. If the coach sits level the air bags are probably OK. You should be able to find Bilsteins on line for about $100 per and have your shop install them. May be cheaper than having the shop get them. Konis are reportedly better shocks but I think they are considerably more $. Someone else on form maybe able to confirm. If you coach is like my 01 Contessa, it has 6 shocks; 4 in front and 2 in rear. Check to be sure or maybe another Monterey owner can verify.
Steve