I believe that the limited like evidence can be safe food for inference, but not solid enough to establish behavior. In the two examples I used above (Sunnyslope and Bossburg), both were in mid-winter, both were in central or east Washington (on the east side of the Cascades, and thus not in the coast range), and both left a long trackway (miles). As Nathan correctly clarified about my post on sasquatches in the Coast Range moving towards beaches to utilize beach foods, this is not likely at all of sasquatches in mountain ranges east of the Coast Range, like the Rockies, Blues, Cascades (south of the Columbia River), Sierra Nevada, etc (although sightings and trackways found in California's Central Valley in winter even infers that they might migrate to the Coast Range from the Sierras, or vice versa, on occasion).
Peter Byrne once found a trackway in snow. I forget where regionally. He followed them through difficult terrain for miles. I don't think he theorized a general direction or motivation for the travel. The most notable thing I remember about his account was, at one point, the tracks walked atop a large fallen log covered in snow, and then the track maker jumped several feet to another snow covered fallen log. He was impressed, writing that such a jump was not possible by a hoaxer. What I find disappointing about his account is that his report on it, from his personal experience, is recorded in one of his books, but otherwise is lost to a queryable database search so that it might be available to help alleviate one of your recognized disclaimers (small sample size).....................