There's public parking just behind mellow. There is some street parking but typically hard to get.
You could also pull into the graduate hotel to drop them off if needed. Agree that water Street garage is usually the best option. Sometimes you can pay to park in the church parking lot across from the graduate but I'm unsure what the hours there are.
Water Street parking
Parking garage provides ample space and plenty of available spots, usually. We have a suburban and can park easily there.
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