We observed every day during our visit (particularly in the evenings) locals and/or non guests enjoying the Aulani's restaurants, cocktail lounges. Had staff tell us locals were visiting often. Yes, they do a different color wrist band daily for guest to monitor use of pool areas and associated amenties and as standard with all Disney properties you sometimes have to show your resort card id given to you at check in. Beach front access to and from the resort property is gated and can only be accessed by your resort card. Sometimes the gate was also monitored by a staff member. Parking will be the hassle if the public beach park lot fills up, plan on paying even if you come just for the day or evening I think pulling up to the front hotel entrance valet is the same daily rate if you just pull in the parking garage and self-park. And as mentioned if you eat, they will validate.