You should definitely stay atleast one day! They have kama'aina and military rates, though I just called today and those are all blocked out through the summer (until the end of August). If anything, I'd suggest coming to just walk around and hang out at the lagoons and grabbing a bite at Monkeypod for happy hour.
We live in Kapolei so Aulani and the lagoons are much closer to us, though if we lived on the other side of the island I'd be at Bellows every single week! We're here for a few more years, and we've loved being stationed here so far. Enjoy the hikes, beaches, and food!