How often do you change your cards? I have heard everything from every 3 days to once a month. Some of my spots have so much deer traffic I get like 600-900 pics a week so it gets unmanageable. Just curious if some of you have worked out a recipe for success in terms of time periods to change cards without stinking up a stand site or alerting deer of your presence. I have been giving mine 1 week. But I am considering doing it every 3 or 4 days just to make it more manageable. What do you guys think is that too much activity? Many of my parcels of land are small and the deer are suburban so they are more used to people than most areas.