Is that a Tundra? What does the yellow sticker in the door jamb say the carrying capacity of the truck is? This is important. I believe most Tundras fall short on payload (less than 1400).
What is the gvwr of the trailer? Dry weights mean nothing. The dry tongue weight means nothing.
Most people load at least 1000 lbs of gear into an rv. I have 1800 in mine. This means that the tongue on the trailer if it weighs 7500 loaded will be around 1000 lbs. Ad 75 for hitch, 300 for cap plus add weight for whatever you load into the bed and passengers. I bet you are looking at around 2000 lbs loaded onto that truck. If you think it is squatting now, wait until it is loaded. Air bags do not increase payload on a truck and will not fix it. You need a bigger truck. Your first towing experience loaded will validate my claim.
