Pretty sure bears have some attraction to plastic. We hid several roll up plastic sleds on top of a mountain near this area several years ago. We wanted to use them in the future to drag deer and bear with. When we went back to get one after shooting a bear we found that the bears had dug them up and chewed them to bits.
This is a low saddle on top of a 3,000 foot ridge. Deer and bear use it all the time to cross. During the time the pictures were being taken there was a ton of acorns being dropped. I also dropped some scent where they are stopping every time I went back to check on the cam, hoping to get them to stop.
"When you're afraid, keep your mind on what you have to do. And if you have been thoroughly prepared, you will not be afraid."
- Dale Carnegie