I do the same.I used to buy Eneloops but now buy the Amazon branded high capacity AAs for my cams.
Amazon.com
www.amazon.com
Depends on a number of factors including ambient temps, the efficiency of your camera, how many pics you’re getting per day and the number of night pics. I get up to 10-12 months on some of mine.Never tried rechargeables in my trail cams. How long do they last compared to lithium or regular alkaline batteries ?