Unfortunately, there is no free parking at the Idea Center. The most convenient parking is the Playhouse Square parking deck on Dodge Court, behind the Idea Center. This is a pay lot and parking is not included with registration. The Idea Center is downtown so there are plenty of other lots available but they are all pay lots.
There is an entrance to the Idea Center on Dodge Court street but it is the back entrance. Attendees and organizers parking on Dodge Court can enter through the back entrance. There is a security station there staffed 24/7. The security guard can provide directions through the building.