Originally Posted by Homebrew
Mike you might get more help posting this under the XLR area.
This is probably the best forum to ask the questions, as towing related questions cover all trailers.
To answer a couple of the OPs questions:
The Andersen Hitch seems to work OK for heavy duty trucks pulling smaller trailers, but not 1/2 tons pulling heavy trailers. The Andersen has not been proven (at least on this forum) to transfer enough weight to the TV front axle. Consider another WDH with integrated sway control such as anEqual-i-zer 4 pt., Reese Straight Line Dual Cam, or Blue Ox Sway Pro.
Anything loaded in the cargo area of a toy hauler takes weight off of the tongue. That is why many toyhaulers have a heavy unloaded tongue weight......once cargo is loaded, the tongue weight comes down. Loading up 1100 lbs. of cooking supplies in the cargo area could take several hundred lbs. off of the tongue weight. The OP may need to tweak the placement of the cargo to get a good tongue weight of 12-15%. Of course, anything loaded in front of the axles (camping gear, clothes, food, etc) will add to the tongue weight.
If someone is exceeding the P series tire ratings, then they will also be exceeding axle ratings, as the tires should always be rated more than then the axles.
With a properly setup WDH, air bags should not be needed, and IMHO they should not be used on a 1/2 ton truck......to easy to give you a false sense of safety when the truck doesn't settle. Air bags do nothing to distribute the trailer tongue weight to the TV front axle.