I keep them close to the sidewall max all the time. In the winter I want it to cut through the snow, so I don't want any sidewall squashing. I also tow a large snowmobile trailer as often as possible. In the summer, we're camping as often as possible. It's just not worth the effort to be changing it all the time, and I don't like the spongy ride caused by the lower pressure.
2014 Ram 2500 Mega Cab Laramie 4x4 6.4L HEMI 4.10s with antispin
2014 Jayco Jay Flight Swift 287BHBE
Equal-i-zer 90-00-1200(new 90-02-4900 shank)
2x Honda 2K