no guaranteed spots but it never fills. i met up with a friend before a game last year and he was on like the 3rd floor there. his truck was the only one there.
The 3 Purple Checkered Garages (B, G & Q) surround Scholz's Beer Garten and they do fill up fast.... Garages B (great for tailgating if you get there early) & Q are much larger than G!