Absolutely keep her on a tie-out or a leash at all times. She is in an unfamiliar area, with strange creatures and strange noises, and if she gets startled, or just plain interested, and runs, you may never find each other again. It's not worth the risk. Just choose where to put the tie-out where it won't get tangled or interfere with the activities at the campsite (as in, don't put it where it will trip you every time you leave the tent!), and everybody will be safe and sure to come home!