I should clarify that the time we went wasn't super crowded. It was busy, but not insane - it was the first week of Feb two years ago. We are going again, leaving this weekend, and the resort seems sold out. So I have my "I'm preparing for the worst" hat on. When we went last time, we ran into a couple of times where there were no chairs around the pools, but it wasn't a big deal to us as we just can't lounge around yet thanks to 3 kids under 5. One time we had Dole Whips and just needed a place to sit for a few and someone just volunteered one of their several chairs for us to eat our snacks. We never had an issue finding chairs at the beach at any time of the day. We had an awesome time and I know we will this upcoming week. We are just trying to set our expectations accordingly -- knowing that we might just stash a tote bag with flip flops and cover-ups while we play vs. having a chair; packing our own sand toys so we don't have to hope the resort still has some to check-out; bringing some pool toys in case the lines for the slides are too long; pre-registerd for Auntie's activities.
The pool water temperature was great. I don't remember that being cold. The lagoon water was cooler, but we played it in several times. I think you can have a GREAT vacation even with the crowds - just as long as you expect it. Kind of like going to the parks. Yes, it can be very crowded, but with some planning and managing expecations, it is still magical.