Hi all! We just got back. We wore shorts and actually swam a few days! Mornings and evenings were very cool, but midday was nice - not hot - but nice! Utilize the lockers at the parks! We'd bring heavy sweatshirts in the morning, store them in the lockers at lunchtime, then get them out in the evening!
The lockers are $7.00 to rent, but they give you back $5.00 when you hand in the key. So for two bucks - it is worth it!
DH wore shorts everyday! But me and the kids wore long pants, sandals, and T-shirts.
Have fun! We had a great time - and wish the same for you!