It fills up between 9:00 - 10:00 and cars start to filter out a little after noon.
If you want to park outside, its probably around 7:30-7:45. I've never seen the structure completely full but ive heard that it gets dicey around 9
I have gotten there after 8AM and still had no issue finding parking.
I've gotten there around noon and the parking outside was full and the parking structure is nearly full.
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