Fortenberry writes:

I've never attended one, but if I had to pick one US 'Clave to
recommend it would be Penn's.

Good choice. It is by far the largest clave and as Ken says, it attracts folks
from all over the country, even a Canadian or two. If you flew into Boston I
could pick you up and drive you to Penns. If you wanted to camp, I am sure
there are enough folks willing to lend you the necessities. Or, you could
share a cabin with some of the North Cackalackians (who have been known to pack
some pretty nice single malt stuff).
Dave

http://hometown.aol.com/davplac/myhomepage/index.html