I believe the store hours are 7:30 AM to 11:00 PM. The store carries an assortment of grocery, snack, and souvenier items. ( including detergent, milk, coffee, cereal, etc ) There used to be a list of available items on the members' website that could be used to pre-order your grocery items and they would be delivered to your room prior to your arrival. I don't know if this service is still offered, but for late arrivals it might be a solution. Check the members' website for more information.
Good luck!