Definatley get a couple tie-outs. I would get a shorter one for at the campsite. Maybe 10-15 ft. And a 30-50 ft one for swimming at the beach etc.
I wouldn't keep her tied out on the long one b/c she definately would get in the way and could hurt herself. They told me that greyhounds weren't allowed to be tied out b/c they run so fast so quickly they break their necks. Shaianne had a short leah no more than 15 ft and knew her boundaries so she was alright. I know Nikki is boxer but with 30-50 feet to run she could hurt herself.
I would definately take a bunch of grocery/WalMart bags for easy clean-up. Of Course whenever you go shopping you have your own free poop-bag!!