Are cameras allowed

No professional cameras ever. If it has a detachable lens it is not allowed. Point and shoot cameras and cell phone photography is typically ok. If an artist requests no photographs or videos signs will be posted or you will be asked by security to put it away. Even when photography is allowed, please remember to turn your flash off.

I've used my phone for pictures and video each time that I've attended concerts there. So unless the event you attend says No Cameras, bring yours and snap away.

All depends on the artist, group. Usually see phones out at the shows I've seen. Research who you plan to see if you don't know. I've heard of a few groups not allowing it.

Depends on the performance. Usually no flash photographer