"I guess the pressure difference from Boone to here was the cause"
I had the same problem, the cold temps "sucked" my tires in.
When I originally mounted my tires, they were a tad small for my liking, plus with foams on a sealed rim, the were a tad soft. I took one side of the bead lock off and stuck them in the freezer for 1 hour. Pull them out and installed the bead locks before they had time to warm up. After reaching room temperature, they had grown almost 1/4 inch in diameter and gotten firmer. They worked perfect with the extra weight of the Wraith. However, like a dummy, I didn't think about what the colder temps would do. They shrank almost 1/4 inch from the original size and when they flexed climbing over a rock, they stayed that way. I had never ran a "sealed" bead lock before now, something to keep in mind I guess.