I don't.
In the last few weeks, I zeroed my rifle at home (5k ft in WA), drove to central OR and shot a two-day NRL Hunter match without adjusting zero, drove home, then drove to ND and shot a two-day NRL Hunter match there. The only "checking" I did in ND was to shoot a target at 750 yards the day before the match. I didn't check zero and won the Open Light division.
I'm leaving today for the match in Cody, Wyoming, and will check my rifle at a distance. I don't plan to check zero unless I see a problem.
Once you have a proven system, you don't have to check zero every time you put your rifle in a case and drive it somewhere. That's something we all grew up doing because we didn't know our scopes all sucked.