In addition to the Hilton Q1 promotion where you receive 1,000 bonus points per night + 5,000 bonus points per weekend stay, Hilton also has another promotion running catered towards Hilton resort stays. For every 5 consecutive night stays at a Hilton resort property you will receive a free night certificate (up to 2 certificates)! Stays must be booked by January 31, 2012 and completed by April 30, 2012. You must register for this promotion by January 31, 2012 as well.
Click here to see a full list of participating resort properties that count towards the five nights. The free night certificate can be used within 6 months of receiving at any of the Hilton brands.