Portable vs On Board Air Compressor?

OK...I will chime in. I have exactly what your looking for. The advice you seek, I have and I have been there. I will give you some food for thought. First, and onboard compressor that can run your airbags on the fly is so nice. Second if you do decide on one, do not mount the pump outside of your rig. It should be in the cab somewhere because the little filter will clog up in no time and burn up the pump. Mine is under my rear seat. Third, while they can support the volume of an air bag system and can pump up a tire in an emergency, it is by no means going to fill multiple tires back up to the pressures that you will need to travel. You can mount a Schrader valve to the side of the frame which you can conveniently connect the flexible hose to.... to pump up things within reason, but this is a air system designed for airbags in general.