I carry a Dewalt 6 gallon pancake, 165PSI, 110V/115V portable air compressor with 30 feet of air hose. This is carried in my front basement compartment of the 5er.
Since I only stay at full hook-up sites this dose not present a problem for electrical power. I can adjust the air pressure so, I can inflate any toys or tires as require using the proper air pressure.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67, TDR 135K+miles