Be advised our wedding was back in Fall 2008.
Cambria Moss and her friend performed at our lunch wedding reception at the Five Palms. We booked them for a total of 2 hrs which was great. Both of them were excellent!!! The rate we paid for 2 hrs = $650. Paid another $50 because we wanted a specific song played (music sheet cost) at the reception. Deposit required.
It went really well. We told them what time to show up and they came on time and left on time. Very professional.
We probably could have negotiated a little but the cost was still within our budget. Your $475 quote is about right but on the highend of course. Good luck.