Wondering if it is possible with the Marriott program to use points to upgrade from a paid rate to get a suite? My wife is considering sending my father in law and I to the Marriott resort in Ponte Vedre Beach, FL on a golf weekend as a Christmas present. Problem is I snore and my father in law is a light sleeper, so it's either two rooms (expensive), or one room and possibly use points for a suite upgrade...anyone ever do this/know if it is possible, and if so, how much?

Thanks in advance for your help!