As it turns out, a mysterious package left on Route 5 in Camillus was an ammo can taped to a guard rail. This article is solely about how the package was not a geocache. Hooray!

http://www.syracuse.com/news/index.ssf/2010/12/mysterious_package_on_route_5.html

Of course, you'll have to ignore the blatant misuse of "geocaching" as a noun.