Bring a saw along also! We prowl around on forest service roads a lot, usually in our little 4wd, but most of the roads can be easliy driven by a 2wd. I can't count the times, 'specially in the spring, when we have found a road blocked by a downed tree. If you have a decent bow saw (and an axe would be nice also) you can, with a little bit of time, clear the road. Without it, you turn around...