Radisson Rewards has a promotion out right now that allows you to earn up to 120,000 bonus points on all eligible nights including Free Award Night redemption stays. You need to book and stay by March 31, 2019 and you can earn as follows:
Stay 1 night, earn 1,000 bonus points
Stay 2 nights, earn 3,000 bonus points
Stay 5 nights, earn 10,000 bonus points
Stay 10 nights, earn 50,000 bonus points
Stay 20 nights, earn 120,000 bonus points