Are you planning on staying CL and doing the Sunrise Safari which is only available 2 mornings a week? Do you plan on doing the Wanyama Safari which has 12 openings a day? If you don't plan on doing either I think you can get away with 2 nights. If you plan on doing the Sunrise Safari, it would depend on which nights you will stay and which morning might have the Safari. If you are planning on doing the Wanyama and can book it the first night you are there, you could stay 2 nights but I wouldn't do it on your last night.