For all events, we ask you to enter through the 1915 Room Entrance on the NE corner of Moontown Brewing Company. There is an illuminated sign that should make this easy to find. 
We have about 80-100 parking spots surrounding the brewery that are shared with the Brewpub + Event space.  We always encourage our guests to ride-share or über due to these restrictions. 
Tip: There is a public parking lot about ~1 block N of Moontown with an additional 30 spots available if you have a hard time finding a spot.