I too have eaten sailcats many times. Very good. Can't recall if I have ever frozen any though.
You are braver than I to try hardheads. One poster on TheHullTruth.com once posted a poll.
The question: "have you ever eaten a hardhead?"
Your three answer options were: "yes, and it was horrible," "yes, and it was terrible," or "no."
That one made me laugh. The responses were quite varied and more people than I would have expected had taken one or two home for the fryer.