Now is the time to book if you plan to go in 2019. Natural Habitat Adventures, the company we chose, only has tours for 6 weeks during October and November. Over half the dates for the Tundra Lodge were already booked out when I booked today. We will spend 3 nights in a mobile hotel that is positioned in September each year at the spot considered to be the best for sighting the polar bears. It is anything but luxurious, with a single bunk room per person and shared facilities. But it gives us the best opportunity for sightings. It's a year out and I'm already excited.