We visited in January with the same goal of just enjoying the resort and we had a wonderful, relaxing vacation. Our kids are 4 and 9 and their favorite part of the trip was spending time on the beach. They loved getting a bag of beach toys and building in the sand, and our oldest especially liked playing with the other boys when he got tired of his little sister.
The water in the lagoon was warm and safe for them, with tiny waves but perfect for them and for us, because we could hang out in chairs near the water but we didn't feel like we had to be in the water with them at all times. We're from the PNW, so going to the coast here is an entirely different experience.
They also visited Auntie's a few times and enjoyed it, the 9 year old more so than the 4 year old, but she's kind of shy. They did the Stitch's Space Goo activity and spent time there while we went to the spa. Our son asked to drop in one day, so he did that while I took our daughter around to meet characters. We had great character interactions and got lots of photos. The Photopass photographers were all around and were fun to work with. Ask them what time they will be at the beach for sunset pictures and get some family photos.
Visit the Pau Hana room to do the scavenger hunt around the hotel. There are also sometimes traditional artists there - we met one who took time to demonstrate and talk with the kids and she was amazing.
We didn't have any problem getting chairs at the pools, but we usually just got one and put all our stuff on it. If we were at the pool, one or both adults were in the water with the kids, and we moved around depending on what area the kids wanted to be in.
Like others, I would recommend that you get groceries for the room to the extent you can. We rented a car from Costco one way from the airport, and stopped at Safeway on the way to the hotel. I'm not sure if you will have a kitchen, but if so definitely take advantage of it. You'll save money and you can eat on your own schedule, which may be really off depending on where you're coming from. Even with a small fridge, you can have snacks and make easy breakfasts and sandwiches on some of your days. Also, if you want drinks you'll save a ton by stocking up on beer/wine/liquor at the grocery store.
Our room was toward the middle of the horseshoe facing the pools and we thought it was a great location. We loved sitting on the balcony with coffee in the mornings and drinks in the evening, with the sounds of the water and music while the kids were sleeping. Ahhhh, I'm ready to go back!!!
