Work when there is work to do. Rest when you are tired. One thing done in peace will most likely be better than ten things done in panic.
The survival of wilderness -- of places that we do not change, where we allow the existence of creatures we perceive as dangerous -- is necessary. Our sanity probably requires it. These places function, whether we intend them to or not, as sacred groves -- places we respect and leave alone, not because we understand well what goes on there, but because we do not.