With recent car rental prices (I’ve heard as much as $200 a day for a minivan and with a party of 7 with luggage, you Might need a bigger van or two cars)), you will have to decide what is more cost efficient. We have been there several times and always rented a van for the 4 of us, for about $400 to $500 for 10 days, so we could stop and get groceries on the way and have it available if we wanted to drive into Kapolei for dinner, go to mass on Sunday, etc. and we are DVC so we don’t pay for parking. But with car rental prices like they are now, I don’t think we would do that again Until they come down, But getting people to and from the airport isn’t cheap, at least $80 for a family of 4 and that was two years ago. With the price of rental cars going up, I’m guessing it would be twice as much now. They do have cabs and ubers stationed outside Aulani. and they will take you into kapolei (which is a few min drive from aulani) for the grocery store, target etc. Kapolei has a couple of Starbucks, some decent sushi and a few other chain restaurants.
As for restaurants, you do have the ones across the street, Roy’s is down the street. The Marriott, a few min walk, has Longhi which is a very good Italian restaurant and the Four Seasons next door just reopened, so some if not all of their restaurants will be open, although they are pricey. Four Seasons used to have a Starbucks, not sure if it will reopen. There is a good coffee place across the street I believe. And if the coffee bar at aulani is reopened by the time you get there, it does a decent latte.