> If you're felling a large amount of trees in a forest, at the bare minimum you need the blessing of the land owner (if that isn't you).

Great memories: I spend an entire summer building a primitive "log cabin" from young trees as a kid with a few friends in the forest behind my parent's house. After the cabin was nearly finished, we were chased one day by a group of adults (apparently the owners of the forest) and hid a few hours deep in the woods. We only returned the next spring, when we finished the roof. I remember how proud we were when we cycled to the hardware store one day and bought a cheap lock for the cabin door. We lost interest the next year, of course, but the cabin remained intact for years. The local kindergarten used to go there for a few years.