Thanks for that suggestion! I had forgotten about the water parks AP. This also reminds me about a special water parks pass that was offered during summer last year.. Maybe we will get lucky and a similar deal will pop up this year too! Thank you again for your helpI don't know what other benefits the Platinum Plus offers that you plan to use, but I think they still offer a water parks AP.
We did that one year instead of upgrading to Platinum Plus because of the dates on our AP and when our trips would be. The water parks AP was independent of our AP. If I recall correctly our AP expired in March and we purchased the water park AP to use during a trip in August. So the water park AP was good through the following August.