Sorry to dissapoint, but max. payload rating can't be ignored, even with air suspension. Max payload is based on a number of factors including tire load capacities and axle design. I found this out the hard way. Also, if for some reason you were required by Highway safety to undergo weighing and found that your tow vehicle exceeds the gross axle weight on front or rear, then they could have you park your trailer and find a tow vehicle sufficiently spec'd to tow your trailer.The air suspension will hold a solid ton without going into overload protection.
Don't bat an eye, load er up and forget about it.