More like tradition, no...? It's always more fun that way anyhow. See you there!
I don't know about tradition - I've been to three Flying Pigs with 10 races and I believe I only got rained on once. Not that there wasn't mud in abundance even without rain falling at the time in some of those 'dry' races. I'll be quite happy if things continue like that.
Until Friday, assuming you're in for all three days.