Convention fandom or Con Fandom is the collective term for fans whose major form of fanac is attending or working on conventions, especially if they travel to do so. Smofs, hucksters (those who are also fans and not just dealers), filkers and other traveling jiants fit this category. It is possible to be both a fanzine fan and a con fan, but not common.
Fans who actually organize and run conventions are often called con-runners and are a subset of convention fandom.
See also Conrunner.