Yup, as of last night they are expecting 14,000 (don't know if that's bikes or people) and 120+ vendors. Places are clearing out extended parking spaces and finishing up the patio bars as fast as they can. I'll be riding through the whole mess to get to Buckhorn for a meeting, which is exactly what happened last year but that was only 1,500 bikes at peak.
On Sunday I'd say the equipment will be off to the side of County 8. What you'd get is brief patches of gravel where the asphalt is scraped off, and there was a stretch of a few kilometers nearer Bobcaygeon that is scraped off.
Getting dirty is a sure thing, otherwise I'd ride it.
From Lindsay to the south you could come up 36 or take another few minutes and use 17 Pigeon Lake Rd. for a great view of Pigeon Lake at the high point, and two left bends you can dive into.