This book published an authored by Church and Church will be the second most valuable resource on this trip. The authors have traveled to Alaska via RV many times in the past years. Their insight and a wealth of knowlege about campsites will be a guiding factor in determining our travel plans. In addition to the book they provide electronic updates on the web in order to maintain and insure all information is current. All locations are GPS loaded and accurate to within 9 feet of the orginal marking. As youcan readily see the GPS will help us in locating the camps and to determine distances we will need to travel between locations.