What about parking for private event attendees?
There is metered parking on the street and several parking lots close by. There is a large parking lot 1 block away. All Parking is metered up to 6pm on Saturdays. No meters on Sunday. Senate Garage can also help arrange a bulk parking rate with the city. Valet parking can also be arranged.
If you are securing the outdoor state grounds, there are approximately 30 spots adjacent to the property for your older guests and family that are included in the outdoor rental.