We will have three chances to see tigers and pick zones. By the end of our second safari, we learned that Zone 3 is the best area to go to. Not only are tigers relatively easier to see, but there's a more picturesque areas.
With us already in zones 4 and 5 the first two times out, and a conversation with a retired Californian biology teacher who had figured out about zone 3, Joe picked and we got the best zone.