I'm not sure what you think you'll need that will require access to those other stores. You'll need to rent a car (available on the property) or take a taxi to reach the stores you mentioned. Onsite, the gift stores in the resorts have some toiletries, OTC medicines, books, magazines...the usual stuff. You can also find stores that sell snacks and drinks. There are also a couple of Hess gas stations within walking distance from some resorts that have convenience stores attached to them. That's it unless you get a rental or taxi.