Specifically winter, but any empirical/anecdotal evidence would be appreciated... i'm in the Piedmont of North Carolina, so we don't have as harsh of winters as a lot of people do. I am planning a 7 (or so) box series and most of the stamps look best in multiple colors. So i'm planning to put markers in the boxes instead of stamp pads. All of the markers i have found in letterboxes have worked pretty well. This is better than i can say for the stamp pads i've found in caches, but i have no idea how long each stamp pad / marker has been out there.

Should i expect to have to replace these markers next spring?