Just an FYI for all.
I called National to check on the Priceless contract ID and found out that you should not need to show proof of membership. Also, I had noticed that on the ressie with the priceless ID, it was not showing the concession fee as part of the surcharges. That saved about another $12-$15. He said that was OK too since National has differing agreements with it's partners.
Looks like the prices are good.