Hi Joanna,
You have every right to be excited - July will be here before you know it!
It is possible to rent a Beachcomber Shack Cabana at Disney's Typhoon Lagoon Water Park or a Polar Patio Cabana at Disney's Blizzard Beach Water Park. These Cabanas include an attendant and waiter service, private lockers, all-day drink mugs, cooler stocked with ice and bottled water, lounge furniture, tables and rental towels for 6.
Premium Beach Chair Spaces are also available to rent and include 2 lounge chairs, umbrella, cocktail table and 2 towels. Limit is up to four people. These are called Lodge Picnic Umbrellas at Disney's Blizzard Beach Water Park and Getaway Glen at Disney's Typhoon Lagoon Water Park.
Although it is a few years old now, there is a post on the Disney Parks Blog called
Enjoying Polar Patios at Disney's Blizzard Beach Water Park which provides lots of information and photographs of the Polar Patio Cabanas and Lodge Picnic Umbrellas - Premium Beach Chair Spaces.
I would also recommend that you take a look at the Typhoon Lagoon FAQ and Blizzard Beach FAQ sections of the unofficial website AllEars.Net ( http://allears.net/btp/bb.htm) to give you an idea of costs (please do however bear in mind that prices are always subject to change).
Reservations can be made up to 180 days in advance by calling 001 (407) WDW-PLAY or 001 (407) 939-7529. It is also possible to book Cabanas or Lodge Picnic Umbrellas on a walk-up basis once you arrive at the Water Parks although availability cannot be guaranteed.
Full payment is required when making the reservation. If you want to cancel, you must do so before 9:00 am the day before your reservation.
Wishing you a magical trip filled with memories which will last a lifetime!
Emma