@DCLCrazy64622 We're DVC members with Aulani as our home resort (so you know we love the place). I'm going to take the opposite view of
@nkereina. With only 4 days (probably more like 3 1/2 once you factor in flight arrivals and boarding the ship), I'd stay in Waikiki. Most of that area is walkable (long walk but walkable). For the things that aren't (Pearl Harbor, PCC, Hanauma Bay), the transportation options to get you to the tourist spots are easy to find. Put it all together and there's no reason to get a car.
At Aulani, you'd have to get a car to see anything (plus worrying about dropping it off before the cruise), its definitely a longer drive to just about anything you'll want to see and with stuff closed, I'm not sure they'll be enough to do at Aulani to keep you entertained for 3 1/2 - 4 days.
Here's the ultimate cop out ... You really can't go wrong either way.