Elementary, Watson! Look up some of the Scottish Highland games that take place in your part of the world. You'll probably find a Watson booth there manned by fellow Watsonians.

The Watson clan site linked above is pretty stale (last updated in 2000). Take a look at the U.S.SCOTS Directory of Scottish Highland Games and Celtic Festivals, which doesn't appear to be all that well maintained either, but it does have some information on games in North Carolina.

Probably a better site for games information though is the Association of Scottish Games and Festivals. They have what appears to be a very complete listing.

Good luck!