Gregg,
Classes and Catagories are only for judging purposes. The ACBS chapters decide whether to have their shows be ACBS judged events, or not. The Minnetonka Rendezvous is not a ACBS judged show, although the catagories remain the same. The BSLOL chapter has included fiberglass boats at least as far back as the 1985 Rendezvous when a Glastron Saberflite was at the show.