All 3 schools you mentioned are class 4A, the state's largest designation. York and Northwestern are picked to finish 3rd and 4th respectively in their regions (like our districts), which would make them playoff eligible. I don't know anything about Chester. Actually, I'm not 100% sure they're 4A. We play 2-3 high school tournaments a year in South Carolina and any team that is ranked in their region is a pretty solid team. A good source of info can be found at SCVarsity.com. I hope that helps, good luck.