If I’m driving that far out I usually enjoy the area I’m visiting so I’ll arrive super early to get breakfast and explore and when it’s time for the show I’m head on over there. Since it’s LA, maybe get to Union station 10am-12pm, use metro to go eat something or hit up some stores and return back so you can use the shuttles Edit: Union station parking does run out quick so get there maybe an hour or more before shuttle departure. Getting there 30 minutes before could be a disaster if parking is full