Unless you are driving for hire, there is no reason to have a CDL. Too many attachments go along with it like the physical, cost, BAL, etc. I got my CDL for work when I was 19, but let it go when the added restrictions were instituted, and my position no longer required it. I got my Class A Operator last year when we bought the 5th wheel. I recently called the DMV and found that no air brake endorsement is required for an RV. In fact, it is not an endorsement, it is a restriction for a CDL, if you don't take/pass that portion of the test. Class A or B Operators do not have that restriction.
Scotty and Kristen, Airedales Dagny and Wyatt
2007 Newmar Mountain Aire 4528, 450 HP ISM, Allison 4000, 8 Trojan T-105's
2014 F150 4x4 Crew Cab Platinum 157" WB
Roadmaster Blackhawk 2, RVI2 Brake System