Sorry to hear about Scout. I'm thinking your best bet is going to be the place you parked your vehicle.
My lab used to make a habit of getting lost in the woods while hunting. Sometimes miles away from the road. I gave up on waiting on him as it was getting dark and hiked a few miles back to the truck. Sat in the truck for a few hours and then he came down the path about dark. I think he tracked the scent to find me.
