Are you sure we're not talking about the same place? lol. I have no idea where Ali's lot is. But "across the metro north station" sounds like we're talking about the same, if not similar, place?
It's not a garage, but rather a single parking lot that they park cars one in front of the other. It's generally quick to get out during lower attendance matches like yesterday, however during red bulls I was stuck maybe 10 minutes before I could get out.
The way to get in is if you come from Deegan South (where I come from) get off on the Rupert's Garage exit and the flag waving guys just wave you into that parking lot, it's the first lot on the right side in front of the big bat. I used to ignore them and go into ruppert's, but i figure those 10 minutes are worth the $10. And getting back to the Southbound route is even easier since it's a right turn out of the lot, as opposed to Ruppert's left turn (yuck yuck yuck)