Torquay. As others got a soft spot for them. From memory we won their once to seal the play offs and once to get automatic promotion (2000). Both times the harbour was a sea of claret and white and the sun beating down.
Almost impossible (might even be with the actual games to be played) but Boreham Wood. Can then bore (not intended) everyone with how I have played there a few times in my youth.
edit: cant find the playoff game so must be mistaken. Im sure we have had 2 parties down in Devon though and celebrated on the pitch