There is limited parking in the venue parking lot. There are also paid lots across the street and street parking near the venue. Follow this link for a map: http://downtownmarketgr.com/visit-us/parking
MOTU is an app that you can pay for your parking through. https://www.grandrapidsmi.gov/Government/Departments/Mobile-GR/Motu-App-Guide#section-2
Uber and Lyft are available in Grand Rapids. If staying at one of the blocked hotels, it should be a 3-5 minute ride there.