It appears to me that the hitch weight alone is over your cargo capacity. Now, add passengers, driver, stuff you normally carry, fuel, and you will be way overweight. Adding airbags may help, but you need to consider what would happen to your warranty if something happened and you had to utilize the warranty. I would bet it would be voided. Not only that, but you didn't mention what the COMBINED GVWR of the truck is. You have to add the weight (outfitted with everything you can think of, including water, grey and black tanks full, because at some point that will happen, propane and any thing you carry in the truck or 5er) of the 5er to the weight (loaded) of the truck to determine what your GCVWR is and whether you exceed it. A good rule of thumb is 80% of your GCVWR is what you need to be safe. Whatever you do, don't forget that warranty, because it could be a killer.
