We ate the Clambake over spring break. We found the meal to be expensive - although the food was good, the selection was rather limited for a buffet. (We had eaten at Lobster Feast on International Drive the night before - less expensive and more variety.)
We also were disappointed in the 18% gratuity that was added automatically to our bill since our party was "large" (8 people). Our waitress did not do anything to deserve that much of a tip - only brought drink refills once, and we served our own food.
Just my 2 cents - we will not be going back.