I am coming down this evening for the TSO concert, can I bring my camera?

Only if it's not "professional".

They dont have issues with cameras really. Just try not to use flash often otherwise they will ask you to put it away. Plenty of people take videos and pictures for them to be able to tell you not to.

Tes. Basic cameras are allowed. No special cameras and no adaptions for cell phone cameras.

Yes I don't see why not. As long as your not interfering with the performance it shouldn't be a problem

Yes