Kids pass is for kids only or adults also has to buy? After checkout at 11 AM can we use the pool again later?

The passes are great for kids or adults. We just took my 6 year old and we only got the pass for him, you do not need to purchase a pass for an adult. When you checkin you get a wristband that is good for the waterpark from the day you checkin to the day you checkout. You will be able to use the waterpark all day, even after you check out. You can also check in early and use the waterpark until your room is ready as they will text you the room number.

What Scott said

Yes, you can use pool later in the day after checkout .