I am currently planning a series and am considering the rating for the final. The series will consist of 20 caches through a state park that offers camping to backpackers and boaters. The hike to retrieve all 20 clues will be over a lot of natural terrain and steep topography. The total hike will be a minimum of about 17 miles and should take at least one overnight trip, 20 caches with 2.5 through 3.5 star terrain, and 1.5 to 3 star difficulty to get the clues to the final mystery cache.
After finding all 20 caches, should the rating of the final mystery cache incorporate everything a cacher had to go through to get the clues to find the final, or should the final be treated as a separate cache?