Find water, I've had it happen more than once. Or watch for the crows, they will seek-out the rotting meat which I'm sure coyotes have found and started on. Good luck. I always wait at least an hour before tracking an arrowed deer. Eat a sandwich, send a couple of texts to your buddies telling them about how good of a hunter you and your wife are, grab a bottle of water then start the tracking. Again best of luck, it's happened to all of us at one time or another.