I do usually go to the Nassau show, and it is a pretty week show. The only reason I go is to get some relief from Cabin Fever, and I take the kids to get them out of the house. The Freeport show in February is a much better, focused fishing show, with equipment and terminal tackle that is made for our area. It is small, but well worth the trip.
The Rockland county show is kinda the Godfather of all the shows. They do have a ton of worthwhile booths. IMHO, it's almost too big.