We will be there 3/10 - 3/19 for our spring break. We've been 2 other years at the same time and found moderate, but manageable crowds. Most of TX has their spring break that week, with some the week before and a few the week after. I agree that if you could go earlier, the crowds won't be as large. We've lucked out both trips in that the weather was beautiful. Have a great trip!