WHY???
Because of this-> What Chuck said.... there is “no” reason to overthink this! Some folks would have you....dropping air pressure when you drop at a campground, and then re-air prior to departure. Properly inflate for the outing ( whether it’s a weekend or an across the country vacation), then take them back down after your outing. I leave mine at my desired pressure all the time. I tow several different trailers (of differing tongue/pin weights), and often not towing....I would forever be adjusting tire pressures. I can’t be completely incorrect...as I got just over 60K miles on my original set of Michelin’s.