The Ingleside has three large parking lots available to Midwinter Guests, and there should be no trouble finding a space during the show.
The Milwaukee and Waukesha County Transit Systems (MCTS & WCTS) have bus lines that travel just about anywhere you need to be, Including a stop near The Ingleside. Full route and fare information will be posted here soon.
Depending on where you're coming from, ridesharing may be your best option and it ensures you have a safe ride home. Both Lyft and Uber are available.