You might also want to wash it and give it a wax before you put it away. I've seen to many people not wax their cars and the dust collected and the car needed a great deal of buffing.
Also, make sure you get all the sand and salt off the bottom of the car, it will rust very quickly with any moisture.
Try to park/store in a garage out of sunlight, it will help with the car not fading.
Have fun and come visit us!!!!!