Same problem in Glacier NP. We ended up sleeping with our leather boots inside the tent with us. Stinky, but we didn't have chewed boots the next morning. The rangers also told us to pee on a flat rock if possible, so animals don't dig up the soil trying to get to the salt. I was a little suspicious about that advice. I bet they had a big old ranger laugh after we walked out the door, and told the next group that they should pee into the wind, possible...

I think a SPOT Beacon would do for most solo trips, it has a few drawbacks and you do need to understand the technology behind the Beacon. More importantly make a proper route card and carry basic survival gear with you (means to light a fire, survival knife, first aid kit, compass, etc.).

Something that I like to do is leave a change of clean clothing along with snacks, cool drinks and other stuff in the car for my return. It is really nice to be able to change out of stinky clothing for the ride home. i don't have to keep turning around to see if a dead grizzly is in the backseat.

I think somewhere in the four pages of helpful replies, you guys scared off the OP.

The OP is probably still out trying to find and buy all of this stuff, so he no longer has time to post here.