When you get to the greeter station, tell 'em it's your first burn and you want to know where the theme camps are. They'll give you a map and show you the areas for theme camps - you may not camp there, as people in theme camps are in a group. You then may camp pretty much anywhere else.
My suggestion is to pull up to a likely looking area where there's space for you, get out, and ask whoever's around about camping there. People are not allowed to save spaces, but some probably will try to, and you don't want to pitch your tent in some place they're trying to save.
More likely they'll hug you, say welcome, and ask if you need any help. Now, here's the key: is there something you don't like? Country music real loud 24 hours; drunk frat boys yelling at girls and mooning them; xtians; loud generators -- basically you want to ask them what they're going to be doing that's going to drive you crazy while you're there. If nothing sounds too bad, thank them for the offer of help, accept it, and get together with them and throw your camp up.