@mihailll,
Thanksgiving, Christmas + New Year's, and Spring Break are the worst. (Worse even than the summer, which surprised me.)
Going around but not during those times seems to go well -- November before Thanksgiving, for example, or early December, or mid-late January through late February.
Friends of ours went in earlier January and there were still a lot of people, but then other friends went a couple of weeks ago and they didn't have a problem with lines.