I went on Sunday, from Orange County with 2 kids, so public transportation was not an option. We got there an hour before first pitch, and there were plenty of spots behind the left field area of CitiField. I was surprised actually at how many. It wasn't that hard to get out of after the game either. I think for a weeknight game, as long as you get there a little early, parking should not be a problem. But, for $15, if you have an alternative like BG suggests ( a spot somewhere on the #7 line), you could do that too.