...Well, since you asked. Here in Mass, we annually collect trail registers from all of our overnight sites and trailside register boxes and count the number of individual entries. This is not a scientific analysis of trail traffic and includes hikers who put in an entry, and does not include hikers that did not--regardless of the length or type of trip. Obviously it would not do as a way to count individual hikers/campers, as some undoubtedly make an entry for every book while others make no entries at all. So it's just a somewhat impressionistic snapshot of trail activity. You can see it at this link, or not.
BTW, this was the busiest season ever for Upper Goose Pond Cabin.
Cosmo
http://massatprojects2012.blogspot.com/