My suggestions:
1. BRING CASH! TONS OF IT! In the room just off to the left where you enter the venue, there are TONS of CDs for sale. You do NOT want to miss it! I think I spent $200 there. My friend spent $500. Its awesome! No need to go on Amazon or elsewhere to find ProgPower CDs. If I remember correctly, Nuclear Blast and Century Media (the biggest metal labels) were there selling directly! No middle man! But many of these vendors DO NOT take plastic. Good old American cash works well here.
2. EAT EARLY! Getting a meal at the venue is a pain in the ass! You can order chicken strips and hamburgers at the bar (same place as the CD sales) but they are expensive and SLOW! Best bet - eat before you go. Or have some food in your hotel room when you get back.
3. TAKE MASS TRANSIT! If you're flying in, take the MARTA rail system. It works well. Hopefully this year they've done all their track repairs and you'll actually be able to go places relatively fast. My friend and I took it last year and it worked out well. We went all over Atlanta on it.
4. BRING EAR PLUGS! The venue is small and LOUD. My friend and I saw to the right of the stage (stage left) and it was very loud. Great seats, but in front of the speakers.
5. SLEEP BEFORE YOU GO! If you're a morning person (like me), staying up to 2 AM is somewhat difficult. Sleep before you go. Otherwise you might want to doze off during the show. I know, it seems difficult with all those decibels of hard hitting power metal, but I damn near did last year!
6. BE FRIENDLY! I never NEVER realized that prog power metal fans are so friendly! This crowd is by far the best I've ever seen at a concert. But overall these folks are nice. Be kind to your fellow metal fan!
7. BEWARE OF THE STAIRS! The whole darn venue is dark (except in the CD sales & bar area). When the bands are on stage and you leave to eat or take a whizz - be careful walking to and from your seat. I was careful, but I could have easily fallen on my ass.
If I think of any more, I'll post it here.
"Diamond Dave"
http://www.dmine.com