Hey Clampet, I have no idea as to how big the Herring are, but I am told they are plentiful here. As for being warm, I have a floater suit and it seems to do the job very well....my biggest thing is I'm nervous on the ice, my first time on it was the year I held the first Fishing for Tyler...Lew and Raf might remember that, they found it pretty funny
Maureen