Are you looking at this July? If so, that would be very late to secure a DVC rental. People start booking DVC 7-11 months in advance.
It is considered high season since its summer time, when many people can only vacation. I would also expect it to be busy this July because major refurbishments begin in August, so there may be folks trying to get their trip in before that begins. But that said, the resort can only be as busy as its capacity. In other words, if the resort is sold out, the grounds won't exceed that. It can still feel busy with a battle for pool chairs, but IMO, you can still enjoy the pool and beach just fine.