Ron, that pic is awesome... you look like a sherpa climbing k2.
At that point a trailer would definitively be better. An alternative would also be a roof basket to break up the concentration of the load. I think I'd go for that before going for air lifts personally.Our family of 4 on a 10 day vacation...
To level-out the FJ, with all that weight on the hitch...
air-lift springs inside of the FJ's rear coils.., Air Lift Company
To the OP, we obviously get by with the hitch basket, but I'd be more satisfied with an off-road trailer. An off-road trailer is on my wish list, but trailer storage is presently a problem.
So, the heavy duty hitch basket has served us well.
That is friggin awesome... I'm going to have to build oneHere is a custom rack for the trailer hitch. It folds back and down so you can open the back door. I also add a reciever on the aft of the rack to receive my bike rack. The storage box comes off and I can replace it with a giant cooler. Works pretty good, but a trailer is in the works.