Stage 5 looks good then - especially as the bloke who won our last two D races (and came 2nd in the other) will probably be a C by then - he's on something like 2.497 w/kg at the mo - meaning the field will be completely opened up. Also liking Stage 9, as that's only got one climb and a lot of flat afterwards.
And there's a good chance for some subterfuge on the final stage. I'm sure some savvy riders will know to use mountain bikes, but I have a feeling that most won't - you've just got to hope that some loudmouth doesn't give the game away in the chat in the pens. I'd probably turn up with a road bike but then with 30 seconds to go switch to an MTB, so that even if anyone else notices, it's too late for them to do anything!