What you describe sounds good to me. A PC is the equivalent of a Tux (Black Tie) or just a bit above it. You might look around for a "bum freezer" , even one with a knit waist and cuffs. Put the belt over the waist-band, and it looks very dressy (sort of the equivalent of a Sport coat & Tie) If my memory of Wofl-trap in August/early September is correct, it is likely to be too warm for a PC anyway! Definitely hose with flashes, especially if you are going to wear a fur sporran.