Pit is closest to the stage and speakers. If you don't mind staying on your feet for the entire concert & your hearing is concert ready, you should be good. Be aware that going to the bathroom or getting drinks or snacks will take FOREVER due to long lines and people who don't have good seating are likely to sneak into any empty spot they can find. We had to "evict" people from our seats at the Ozzy concert.
The pit is closest, then seating, and then the lawn/general admission. Pit is worth it if you want to stand up the whole time and be close to the stage. If you want to spend the least and relax in the grass, go with lawn.
Get there early and sit up front on the grass. Park by an exit. Getting out can take awhile.
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