On my E350, I will be adding airbags very soon. Even without an onboard compressor, you can install them with just a schrader valve and pump them up accordingly when you need it.
I'm grossing 10k# these days. Yes, technically overloaded according to the door sticker, but my H-rated (16ply) tires can take it.
Also, SRW trucks don't get routine checks around here so long as you're rolling down the road without a saggy butt.
