You should drink all your whisky in one huge chug, and then get out of your tarp, say, "I'm sick of these motherf$%ckin coyotes on this motherf^%ckin' hill." and unleash a 20 minute long obscenity-laden tirade at the coyotes, hurling rocks and sticks the whole time. Then, exhausted, go to sleep. They'll realize you're not fit for eating.
But really, coyotes aren't normally a bother.They yap, sound demented, but prefer to eat rabbits and bugs.