I use a box blade to touch up my woods trails because that's what I have. I already owned it for my driveway maintenance. I've never used the scarifiers when maintaining my woods trails: they are not needed, since the soil I'm trying to move has already been loosened up. I have used the scarifiers a bit when cutting in a new trail.
I've never seen or heard of anyone using a land plane to manage woods trails. I don't have much experience with them, but I don;t think it would work on my trails: the ground is just too rocky and hilly. I'm sure it would be superior to my box blade for driveway maintenance, but I would want to see one in action on similar trail terrain/make-up as mine before I considered purchasing one.
Of course, the best solution is to not tear your trails up in the first place. Any firewood I'm taking out gets pulled to the side of the trail with my logging winch (anything within reach of the cable gets pulled to one point on the trail), then cut to stove length - and possibly split - right on the spot and hauled out on a trailer. I minimize any skidding along the trails, though it does happen for short distances on occasion if I need to get the logs to a good work area. I'll occasionally skid longer logs all the way out if I need them for something other than firewood. My trailer is not the greatest for hauling long logs, but now that I have a grapple on the front of the tractor I do load some of them.
Loggers with forwarders or forwarding trailers are getting popular around here for just this reason. It's a lot easier on your trails and helps avoid erosion on hillier sites.
