We have spent 8 nights at Aulani once and ended up driving out to the other side of the island everyday. Waikiki is hard to get in and out so Aulani isn’t a terrible base. This time we split our 8 days in three locations.
Waikiki: 3 nights and do the Waikiki thing such as Diamond Head, shopping, Hanauma Bay and Kailua area to kayak.
Aulani : 3 nights to chill, Central Park of the island like Dole Plantation, Japanese Temple and Pearl Harbour
North Shore Turtle Bay : 2 nights. Polynesian culture center, Waimea beach and water fall. Macdamia nut farm and shrimp truck.