FWIW, those "air bags" are really called "Air Springs", although most of us here typically refer to them as "air bags".
The fronts are not that difficult to change of you're good with a wrench and have decent mechanical skills.
VERY IMPORTANT NOTE: Anytime you're working on the air suspension system, you must have your have your MH supported not only with your leveling system jacks by also with good heavy duty jack stands! (You can get a pair of 12 Ton Jack Stands at Harbor Freight for just a little over $100.)