Teigyr, I'm telling ya, nordic skiing is great! Tell me when you want me to come get you in the new E and go up for some skiing! 
All this boot camp talk is awesome! Very inspiring!
I have just started a class that is not really boot camp, but it is an hour 2x week of a huge variety of muscular and core expercises...always different, surprising the body. It doesn't do cardio, but it comes right before the spinning class 2x week.
In the past, I have done equestrian stuff, tae kwon do, swimming, skiing, etc. that seems to get certain muscles not in other exercises. But, this class hits lots of those weird, hidden muscles.
"The best rides are the ones where you bite off much more than you can chew, and live through it." ~ Doug Bradbury