There are plenty of surface lots and parking ramps nearby.
I would park in nearby ramp or lots. Depending on the event it may cost you up to $20 though. Free parking in the casino ramp. For customers only so maybe you do a little gambling or eat before or after the event
Do yourself a favor and park a walk away or uber it in. Getting out in a big event can be frustrating.
Thanks! Your answer is awaiting moderation.