I trust that you won't kill yourself Graham. Besides, your plan can't be worse than mine, which is more or less the opposite - never ride. To be fair, I do get 'rides' in indoors as a part of my circuit training so it's not like I'm not getting cardio (and even bike-specific cardio) but for some reason this hasn't been a big outdoor riding season for me.
BTW, we were mentioning to Graham yesterday over lunch (that he paid for - not a bad way for us to dine) that Deanna and I plan to be at XC8 to cheer on the rest of the TrainingCoop and, if there's need, act as a pit crew. Tom, this means we'd be happy to support you too. We're looking forward to the 1st TrainingCoop road trip.