2013 Dodge Ram with or without air suspension?

I caution about the 2009+ Ram 1500. They have the lowest payloads in the class. Seriously, your current RV would probably put it over the GVWR and maybe rear axle rating. If you want a Ram, get the 2500 gasser or 3500 diesel.

reference 2013 payloads.

I',m generally against air suspension for towing anything when using a WDH. At a minimum they complicated WDH adjustment.