I decided to go with onboard air and separate air/manifold for airbags.
I bought the Air Lift 25980EZ WirelessONE (2nd Generation) with EZ Mount
and
VIAIR Constant Duty Onboard Air System - 10007
I went with 1" steel straps to attach the hardware to the frame, as I wasn't sure I'd keep everything where it was and didn't want to drill all over the frame.
I was able to attach to the upfitter switches, which is great, and I ran the air intake line into the cab of the truck. This was accessed between the bed and the cab, and you can pull the liner away from the back and see the vent.
I bought a rubber mat that I'll install in front of all the hardware to keep junk from the tire getting all over the items.
The quick connect I'll run to the back by the license plate.