I enjoyed the Frederick Fiber Fest a lot. It was BIG! I did four buildings - the one pictured below was the smallest of them!
Unfortunately there wasn't much variety. Superwash merino was EVERYWHERE - my least favorite yarn to knit with. In terms of spinning fibers, most stalls only had combed merino top braids.
I enjoyed the stall selling only Gotland wool, another that had a blend of Romney and BFL, and I came home with a big skein of alpaca yarn!