Hi again Lindy,
thanks for sending me your question! After chatting with my fellow Disney Mom Kirsten, and verifying with a Cast Member, there are lockers available throughout the Water Park, however the locker rentals are available only at the location near the entrance to
Disney's Blizzard Beach Water Park. If you look at
Disney's Blizzard Beach Water Park map, you will be able to choose the locker location that will be best suited for your family.
I would also recommend renting Lodge Picnic Umbrellas for your family, as there is not much shade, and it I believe it is worth the added cost. You can go to Snowless Joe's upon arrival to see if there are any available, or you can call (407) 939-7529 to make a reservation.
Another suggestion would be that if you are planning to ride some of the larger attractions, arrive early for minimal wait times. If you stay all day, the Water Parks usually clear out late afternoon, so again wait times will be shorter.
My final "tip" would be to consider bringing water shoes. The pavement can get terribly hot, and I find that wearing the water shoes, although not really fashionable, will save your feet!
Have a great time on your Walt Disney World Resort Vacation Lindy, I hope you are brave enough to experience Summit Plummet!
Stephanie