Take the website with a grain of salt. We picked Lewiston for going home and it said no wait, but it was a wall of cars when we arrived.
But as for your question, for a 1pm game, you will see a line up at 9am at the border maybe 20 cars deep. Go across at 8am and it’s clear sailing. For this later start, I’d still expect a delay at 9am but I’d guess it’ll be modest.