All I can say is up in the NW, it was easier for a one desing A class fleet to join in existing races. The local YC's, skiff fleets, sailing clubs...all were accomodating. However....almost all said "no" to any kind of handicapping, as the scoring process is delayed. Furthermore, most are advertised as a 'one design regatta'.
As far as Hobie o/d racing goes..I do have a question. It is being said that Hobie is going to produce an A cat this year. If so, does that mean that only "hobie" A's would be allowed? Clearly the A cat is not one design, so if 3 hobie sailors buy a hobie A could not other A's join them?
Probably a bit hypothetical because they have not even made the boat yet....just guessing?
Clear skies,
Michael