I cant suggest a photographer but I am sure you will get beautiful pictures yourself as the kids have a spectacular time on the beach.
Make sure to take them at sunset also, it is a magnificient site.
I also want to suggest a great palce to eat, the Mandalay Grill. It is right across from Clearwater beach and has the best groupper anywhere.
Right now Restaurant.com is offering 80% off their certificates and Manadalay is on the list. So you can get a $25 gift cert that usually costs $10 for $2! just use the code SUMMER.
Have fun!
Clearwater is my 2nd fave place.