Trails cameras are tough. Especially cell cameras. I had one morning that I sat from 6am to 1pm. I saw 25 deer, I had maybe total 30minutes where I couldn't see a deer, and I had 4 pictures on camera. The area I was hunting was not very big maybe 1.5 acres in a bottom that was pretty thick. Likewise the single deer I was hunting was killed that morning, and I hadn't had a picture of him in 2 weeks, but during that week this was the second time I had seen him in person.
If I hadn't been there I would of saw 4 does on camera and thought slow morning, but in reality it was chaos including the opportunity I needed to harvest the buck I was after. I love them so much, but aside from knowing a deer exists, and uses an area. Using them to make day to day hunting decisions saves a lot of deer.