Before joining Marriot Rewards I booked and paid for hotels for our Summer Vacation. I used Priceline. I have one night in a Fairfield Inn in Denver. The trip doesn't start til June 30th. Can I use this stay for points? If not, does anyone have experience cancelling Priceline trip and getting refunds...if easy to do, I also have a night in Vegas at the Trump also booked through Priceline that I could cancel and move to a Marriot location.