Spring Break gets very crazy down here. It is geared toward the young 20 something crowd. Lots of drinking, wet t-shirt contests etc. At night the bars will be packed. During the day the beaches will be packed but keep in mind our beaches are very small and rocky so they fill up easily even off season. One more thing, it sounds like you don't have reservations yet. You might want to call around and see if anything is available. I know several General Managers of hotels and many are reporting they are sold out for the next few weeks.