Leslie, I have shot at Billy Bobs before and if you are with the star and this is mainstage it will depend on how close you are but the lighting is good.
You can see some of the stuff I have posted here :
http://www.pbase.com/stephengibsonph..._band&page=all
This was not the mainstage but the smaller stage in by the dance floor, this might give you an idea of some of the lighting in there.
Cant wait to see some of it if you can sneek and post some of it.
All these were with the 10D or 20D that a friend loaned me at the time and either a 24-70 2.8, 85 1.8, or 100 2.8 and my nifty 50 1.8, running 800 iso.
Hopefully this might give you some ideas.
Steve