funny. i posted that last post before reading the rest of the thread- where someone from illinois and wisconsin confirmed that it is indeed "frolf" in the midwest. the course at big sky is pretty sweet. i havent played in bozeman.
my father is an avid Folf-er. upon asking him his opinion on the Frolf/Folf debate, he said that in the late 70s he knew it by Folf. I would take his word for it becuase he is very good at this obscure sport.