In case you are sensitive to it, that week is usually Gay days.
We have found the least crowds in early May. My Dh can't go in October/ November or December, so with our limited timeframe, early May is good. February is cheerleaders and dancers galore at times, though I hear it is a good time to go. Check Varsity.com for those dates. We went at the end of June before, and it was not horrible, with fast passes and patience, it is okay. HOT though in June- August.