After researching airbags,kinda got it narrowed down to the two. Leaning towards the AirLift with the jounce system in their airbags. Both AirLift ,and Firestone sell the conventional airbags, but Air...
I went for simplicity and plumbed each bag to a manual valve. It was easy for me to air up before a trip and not loose any pressure over our longest 3-week trips. Once home, I was able to reduce excess pressure until our next trip. I never found a need to adjust mid trip, so I never felt not having an on board compressor was an inconvenience (I always carry a portable compressor if I ever did need air).