When I was young, my Grandma had a mess of acres in Milford MI. My brother and I, along with the kids from neighboring farms would spend hours and hours tearing up the fields, hills and valleys. Yamaha 125's & 250's, and the odd honda, all dirt bikes. Started when I was 8 years old, and have loved two wheels ever since.
Now that I have two boys of my own, we own 4 Wheelers (Honda 400EX for my oldest, Polaris 500 Predator, for my youngest, and a Honda 500 Rubicon for me). The machines the boys ride are the 2WD 'Sport' style machines, and they just scream! Mine is a 4X4, and weighs a ton, but still can get me close to 50mph! We have quite a few areas within a couple of hours that offer some great trail riding, and some mud and sand, for just messin around.
My guys are 23 & 19 now, and we don't get out as much as we would like, but it is a great way to spend some time with them. Good clean (not really) fun

I know what you mean, about being sore

I feel better after 600 miles on the Valk, than I do after 75 miles bouncing around on the 4 Wheeler... At 55 years old, my body just dosen't recover from getting banged around, like it used to.
Thanks for the write up, and the pic's

Black Dog