You don't have to show up too early... maybe 30 minutes before tip? The best parking, IMO, is on the other side of the huge CATS bus station. There is a little fenced in lot immediately on the other side of the station from TWC Arena. Last time I was there it was $5 and is a 2 minute walk to the arena. It is at the corner of 4th and S Brevard St.
Even though we're not playing well, the ticket-checkers are still tough. Id say go to 216, 217, or 218 and you'll have a heck of a time. It's right in front of the bar and it's lower than any other upper-deck seat...and for the same price as the nosebleeds!! Best kept secret at TWC.
Have fun and GO CATS!