I typically go a few PSI (usually 3, max 5) over placard in all 4 tires (and the trailer) when we are changing altitude. If we are going up, it gets considerably cooler and we lose pressure. If we are going east, the extra air compensates for the higher ambient pressure. Since we are pretty close to payload with the tongue weight added, I want to make sure we stay at or above the placard, regardless of outside temp or altitude.
This has never created any issues, or uneven wear across the tire tread. I air the tires up the morning we are departing here from Colorado Springs, and just do a back of the hand temp check of the tires and bearings when we stop for fuel or food. I don't check pressures on the road unless something happened.
2019 Flagstaff T21TBHW A-frame with 2018 OEM Castle Rocks
2008 Hyundai Entourage minivan
camping Colorado and adjacent states one weekend at a time
last trip - Trinidad Lake SP, CO
next trip - Indianapolis