I was living in the woods in Arizona for about a month back in 2015ish..

I had one try to eat my literal brain and skull / head while fast asleep in my tent.

Luckily I was camping with someone and he came out of his tent throwing boulders at it. LoL.

I suffered no injury. For your situation though, just fill a metal can with a few rocks or BB's and shake It.

This will emulate a reaction from rattlesnakes and it will go running.