txnese wrote:
...I took it to weigh station right before the trip and it was a hair under 13,000 lbs total. That includes full gas tank, full fresh water tank, 5 passengers and all our junk for a 2 week trip...
You weighed it correctly, full of people, water, gas, and all that Stuff. Weigh Station usually gives you Axle Weights. Did you get those, or only the Total? If you go to a Travel Center (21st Century PC for Truck Stop) that has a CAT Scale, it'll give you three weights called Steer (your front axle), Drive (rear axle) and Trailer (any trailer or vehicle you're towing). All for about $10. They can't give you Corner Weights like some of the RV weighing fests, and like Michelin uses in the RV version of their tire load/pressure chart. Michelin apparently feels that more RV's than trucks are loaded unequally side to side.
With Michelin's Corner Weights, you'd set the entire axle according to the heavier side (not average or the lower side). The point made above, that Axle Weight could be OK but not one side, can surely happen, but most of us find Front and Rear Axle Weights to work out OK.