What changes have you noticed ? It is hard to track down a cause when the changes are not listed . Have your patterns changed ? Do you look at different times ? When I moved to my place 12 years ago i saw lots of deer 20 or more almost every day. Nothing else has changed that much and all summer i see the same deer - a group of 5 -2 spikes and 3 does . second pair a 4 pointer and an 8 pointer. A 10 pointer and one alot larger 22 + inch spread ( some in the 23-24 inch spread get killed near me every year or so). That's 9 deer , my daughter in law sat in a stand last week and saw over 20. The stand looks over my back yard. I guess i come and go different or something ?
So it might be you and your movement.