Not sure this will prove anything, but here are photos taken the other day when on a site where I found the bubbles on the left back corner of the camper showed level both ways, without needing any blocks/ramps. (Bubbles set using a carpenter's level)
Truck has no air bags or extra springs. We got it new in Oct 2002. It drives ok. Been a while since new shocks. On scales with loaded camper, two people in cab, got:
Front- 1620 vs GAWR of 2041
Rear- 2450 vs GAWR of 2760
Total 4070 vs 4173 GVWR or (8954 vs 9200)
Empty truck 2720 so camper weighs 1350 (2970)



I will play with levelling it other ways in the back yard later on to see what happens.