Also this might be a great time to rent a long focal length lens to get the shot. And see if you can get into the photographers area in the front to get some pics. A fancy looking camera goes a long way to help this happen.
As someone who's spent an inordinate amount of time in "the pit", I can say that the above, in bold, is simply incorrect. A "fancy camera" means nothing. I've seen people in pits with point-n-shoots before. No one is impressed by the camera being used.
For national acts (like Zak Brown), access to the pit, normally, is tightly controlled. Showing up the to venue with a "fancy looking camera" isn't nearly enough to gain access. You need to have a
reason to be there ("I want to take pictures" is not a valid reason). You need to be shooting for a media outlet, magazine, record company, etc. If you're not, and you somehow manage to gain access, you're only going to be in the way of people who are trying to actually work and have a valid reason for being there...
You could see about getting press credentials from the bands management in exchange for pics.
I've done that exactly once, and the band requested extensive examples of my work. I get the sense that the OP doesn't have an extensive concert portfolio to share...
[quote[Ask before hand, or ask the venue, you never know they might say yes![/QUOTE]
Anyone who says "Yes!" to some random photographer who wants to shoot a national act is someone who's not going to have a job for very long.
In order to shoot, three entities must permit it: The venue, the performer's management, and the performer. Any one of those three can bring photography to a screeching halt,
regardless of what the other two say...