What is a "winter traveler"? On searching for the term, I only saw websites about travelling during the winter. Is it a sufferer of seasonal affective disorder?
Person with mild mental illness that results in clearer perception, e.g. depressive realism, and often better character. (When your biology is difficult, you don't get to fuck around the way most people do.)
Traveling through the forest during summer is much more comfortable, but you can't get as sharp a feel of the landscape because the trees are leaved out.