I used to pull every stand, every year, but now we leave most up for 2 years and in rare cases, 3 years. We do check/change straps every year though and loosen them so they don't strain the belts or grow into the trees.
This year was a "take down year"...I think we still have 3 or 4 to remove, but most are out. I will go over each stand carefully between now and when we hang them again and replace straps, etc. One thing I started doing a few years back was putting the new replacement strap in place of the original, then installing the old one lower on the stand, so a lot of my hang ons have two straps now...and then I still go over those two straps with a conventional ratchet strap.