We are going to visit my friends this weekend. Tucker is coming along to play with their jack russell. They have big yard with woods behind their house but no fence. (They have an invisible fence for their dog) I want to let Tucker run about and play while we are out there watching but I don't really feel comfortable letting him go without a leash for fear he'd run into the road in front of her house or off into the semmingly endless woods behind. Any suggestions for a tie out that works well or other ideas?