Another option would be to get a hotel somewhere else that is along the red line, then you can take the subway for $1.50 each way. The Hollywood/Vine stop is just a block and a half west of the venue.
EDIT: TheClaw beat me to it. FYI i parked at that lot I was talking about on Friday for the Afghan Whigs show no problem for $5. it's a bit out of the way for most of the Pantages theater goers, they usually get swept up by another lot before venturing that far south.