Hey Mike,
You'll have fun with the dualsport and all will be contingent on tire choice, I venture to guess.
As for me, I've been riding a KTM 400 SX with sensible mods (suspension and engine reliability) for a number of years but am discussing a '06 300 XC-W (2-stroke) that I'm keen on. Rode an earlier version some time ago and loved the device mightily. Lighter than the RFS models with equal torque and ease of ride. Not sure of fuel mileage for longer trail rides like Calabogie but the big strokers are too much fun.
Also have a KLX 250 here but it's a '79 twin-shocker and I hurt myself crashing it way more than on the KTM. The KLX is all original and the tires are about 15-20 years old, could that have anything to do with it?
Keep us posted, maybe we can hook up with some folks for a ride if the rain stops. OK, just saw Stephanie's update -- Sunday or Monday are the only dry days per the current forecast around this weekend.
Fran