Air shock options

Thanks for some quick replies, gentlemen. I don't know much about air bags? Do load adjusting shocks have any affect on height. I'm only looking to ad an inch or two, ideally.

I run air shocks purely so I can keep the same ride height with my trunk full of suitcases for a trip, or whatever else happens to be back there temporarily.
Don't have adjust my mirrors every time something changes the weight.:D