Another vote for the Counteract beads. Got 'em in my 37" BFG mudders, 20k miles and no issues other than a couple miles of bounce RARELY after going over a curb or when the truck has been sitting for a few days. Filtered stems would be nice, I just check my air pressure when I'm around a compressor. Make sure there's no moisture in the tires when you load them up, a lot of mount/balance shops will get a good amount of mounting lube in the tire unintentionally.