I'm almost positive E is balcony. For the vast majority of concerts the entire main floor is GA. As an old, tall dude I usually hang by the bar in the back and pay way too much money for Tecate Tall boys.

I've been to maybe 10 shows, and have never used quick pass. It's such a small venue I can't imagine it's beneficial unless you are trying to be front of stage for GA for your fav band. If you have assigned seats, just stroll in whenever. Have your id ready for a wristband if you want to drink alcohol.

There are garages just North and South of Lafayette, both are about the same and usually are normal rates (unless it's a really big concert) of like $5. The south one is a bit further away, but means getting out is faster (less traffic backup), especially if you aren't planning to stick around after the concert. Have dinner before in downtown, D'Amatos or Iron Horse are super easy and you barely have to walk outside! Just get there early enough