Honestly I’m not sure. I imagine during the week would be a whole lot better. I’ll let you in on what I did this year (to avoid the $20 parking, and I wanted to go there anyway).
Park down at the Grovewood Gallery. Walk across the street, and you’ll be in the ‘basement’ of the hotel (with this gorgeous water feature element you can sit at — I did). Take the elevator up and there you go!