05 4x4 Yukon lift suggestions 1500

[fuelcell]

I am installing a camping kit in the back of my yukon much like you see on youtube with cubbies and drawer system. It will not be light. 2nd and 3rd row removed. This model has the air ride and seems to be working fine but i am trying to find suggestions on the best way to lift the truck about 2 inches. Right now i have 32 may go 33 when these tires wear out. I am thinking of replacing rear g80 to another mechanical lock and redoing front suspension and possible rear as well. Key lift in front way to go? Any suggestion would be appreciated.