The Hyatt and Hilton hotels have the parking lots for the convention center.
It's free on the side streets. Just watch out for street cleaning signs. Different sections are closed for parking each day. Different section the next day. you'll get a ticket without warning even if you park for 2 mins
If you do not mind walking a few blocks, parking is free on side streets. But read the signs you cannot park on all the side streets.
I am not sure. But you will find that information on the website.
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