Air bags when used properly help keep your truck level. They do help with a travel trailer. The first thing I noticed was that I wasn't blinding everyone I met when the headlights were needed. With your truck and trailer level you have more contro...
Your brakes may also be full of grease if someone has misused the fancy grease fitting on the hub. If you can't adjust them try pulling a brake drum to check for grease contamination.
We have used Walmart for 7 years in Idaho and Arizona with no problems. They have always been courteous and helpful. We usually try to be there when the pharmacy opens so the wait time is minimal.