I used 3 of them this year on a bighorn sheep hunt. I too was worried. I hid them well and we checked them every 2-3 weeks. We also made 2-3, 2-3 dayers up there and I checked them first day and last. We never saw any human sign on the cameras except for ours so it made me feel better about doing it again this year. It was also 3 hours away from home.
The cool part about it was I have a tc pic of the sheep my friend killed!