They were more than that last year, it was $125 or something a day all in, save $20. Still a good deal either way
Shannonville has 2 days for $150, lunch included. They usually post that deal up at the end of January or February.
CTMP Big Track and Calabogie are available through DOCC (need to buy a membership) and Pro6. They usually sell out very quickly, so you need to buy your ticket well in advance and hope to hell it doesn't rain. No refunds unless it's so bad (Hurricane, Lightning, Monsoon, Deluge etc) that the track closes.
Oh yeah, Laguna Seca the same 92dB noise limit as Calabogie and are very strict about it.