I have found two:
Great Alaskan Toursaverr
http://www.toursaver.com/
The Northern Lights Coupon Books
http://www.alaska-discounts.com/Tours.html
My family is going up (4 adults and 2 kids) in June. We are staying with my brother in ANC, so we don't need any lodging. Which book might be better? Can they be bought locally in Alaska?
Duke