We are staying four nights at NYNY next month and used a promo code to get a $50 bar credit & 2 rollercoaster tickets. I have been playing MyVegas and would like to comp the first two nights (weeknights) using MyVegas points. I have never purchased anything with loyalty points before and have a couple questions. If I cancel the first two nights (Wednesday and Thursday night) to re-book them with MyVegas points; will they try to charge me the new rate (now $92 more total) for the two weekend nights? Will they still allow me to use the promo code for Friday and Saturday night? Thanks for all your help.