We are going 3/26 to 4/2. Some schools have Spring Break during that time, but it looked like the majority started about a week after that, starting with Passover on 4/9 and Easter on 4/12. Our school's break is 4/9 through 4/17, with the kids returning to school on 4/20.
I'll just hope for the best. We've been there all different times (October, December, June) and we seemed to be o.k. with good planning.