Have to confess, I had never heard of Sandestin before. I see it is close to Destin, Ft. Walton Beach, Panama City, those are more familiar. Some riding information on the area appears in the two stickies directly above this post. I would get in touch with Mark Rush at:
http://www.emeraldcoastkiteboarding.com/ He knows a great deal about riding in the area and should be able to help you out with the normal quiver size. Wind is quite a bit lighter than is usual in the Gorge as you probably know already. As a rule our wind eases off significantly in the summer months. This year has been somewhat unusual with more than normal westerly winds. Westerly winds work great in the Panhandle so if the trend continues, you should be set.