"Don't set your tire pressure based on what is printed on the tire. Fill your tires to what the door sticker or owners manual says. Just make sure that the door sticker is not more than the tire is rated for. "
I disagree. That might be the best for someone who is not automotive smart, but for someone as savvy as a jeeper I would suggest getting a pressure vs. load rating chart from tire manufacturer, and weighing you vehicle, each corner preferably, and going from there. When you change tire sizes, you need to adjust pressures accordingly.
For example, my truck came with E rated 265x75x16 tires. Max load is approx. 3400#s at 80psi. My new tires are 285x75x16's and they have a max load of 3400#s at 60psi. The door sticker says to keep them at 80 psi. I know we all would be smart enough not to raise it it 80 psi on a tire rated for 60 psi, but even at 60 psi, the tire is grossly overinflated.
While It is ok to overinflate the tires a little, as you know, bad wear and handling will result from grossly overinflating the tire. I got a chart from the tire maker, (BFG), and weighed my truck. I now have 55lbs up front and 45 in the back. If I plan on carrying any weight, I bump up the pressure to accomidate it.