I don't know when vacations are for PS but that is the general time frame we go and it is NEVER busy. There might be a day or two that the cheerleaders are there or whatever but never busy.
We don't get a February vacation in PA, however you will find that most areas with a February break have it the week of President's Day. Crowds will pick up on the 17th and 18th. Mardi Gras is in early February this year, with Fat Tuesday falling on the 8th. Louisiana schools are out on break for a few days.