Hi Lee! This sounds like the perfect anniversary to me! Your husband will love the surprise!
For the Premium Patio, the rate is about $250.00/ per day. This is how it is described on the website:
Enjoy a private retreat with a wooden deck and an umbrella shade. Polar
Patios feature a cooler stocked with ice and bottled water, all-day
drink mugs, towel service for 6 and your own private locker. Each patio
comes with a personal attendant and waiter service to make sure your
every need is met.
For reservations and pricing information, please call (407) WDW-PLAY or
(407) 939-7529. Guests under age 18 must have parent or guardian
permission to call.
There is also the option of Premium Beach Chairs. This would be for two lounge chairs, umbrellas, two towels, and a table. It can be for up to four people. You would also call 407-WDW-PLAY to reserve these. This service runs around $40.00.
I hope this helps! Please let me know if I can help you plan your special trip in any other way!