1. Yes, this is a bear track. Measure the large pad, add one inch and that is what the bear skin would square out to. Example: Pad measures 4" + 1" = 5' bear rug.
2. I've never seen a bear tear limbs off of tall trees like that. Not to say they don't. I usually see stumps torn apart from where they are getting bugs and bees.
3. Looks like deer droppings.
4. Looks like elk droppings. Bear scat is more like a dog or human. It is round and full of berrie seeds or grass. Sometimes it will be in one large pile. It looks like the berries gives them the runs. All of the bear scat that I've seen is in one place and not scattered.
5. This looks like a bear had a snack.

You do have bear in that area so keep looking for a good spot for a tree stand and keep us posted.