More than 20 with the bow. Probably 15 - 18 from treestands.
If steep angle try to put the arrow out the opposite arm pit. Better blood and you stay away from the spine.
Only go as high as you need to to see and get a clear shot - 12' is about my favorite. High enough to keep movement above their sight, but low enough to get both lungs easily.
Don't position the stand so you are pointed right at the bear. I try to have the stand just shy of 90 degrees from my shooting lane. That way you don't have to shift your weight around in the stand to get off a good shot. They all squeak at the wrong time so less movement the better.
Hunter's Safety Systems are well worth the money. Quiet, keep your cloths free of your string and none much better for safety. More bowhunters hurt or killed each year falling out of trees than rifle hunters being shot.
Don't skimp on tree steps. Get the best you can afford. Cheap ones break, squeak and are dangerous. I've come to really like the strap on ladders as an alternative.
The old hot water bottles still work the best for relieving the call of nature when in stand. In cold weather they keep you warm and add cushion for your back. In warm weather fasten a loop of parachute cord to the bottle and hang in on the far side of the tree.
Keep hydrated and stand up regularly. Dizziness and sleepy legs lead to more falls than anything else when treestand hunting. Even with HSS a fall is nothing you ever want to experience.
A small book with camo cover and a sleeve you can easily slide it into really helps pass the time. 1 hour in a tree is equal to three on the ground so you are going to get bored as heck of you don't have something quiet to help pass the time.
You can PM me if you need answers to specific questions outside forum space or public knowledge.
