Mobusaki
TJ Enthusiast
You should really try going lower right off the bat. If you are worried 11-12 is a VERY safe psi for most tire/wheel combo's within reason. Get down to 8-10 and the ride on small rocks is much softer and the grip on larger ones is much better as well. In snow or sand you can go even lower safely so long as you aren't carving corners at high speed.
I do go low right off the bat, usually ~10-12. I was saying I might like to start off higher (but don't so I don't slow the group down airing down on the trail) because more often my issue is ground clearance. The bigger Jeeps really dig deep ruts and when there's no choice but to put my tires in those ruts is when I really wish I was aired up (or had 35" tires!).