Think a step deeper: look not just at the activity, but what people engaged in that activity do and at what times of day. Those appear more reflective of the times of activity of humans engaged in each activity than they necessarily do bigfoot behaviors, at least based on how people HERE behave when engaging in each of those activities.
My take-away is that we need to spend more time out in the woods or on the water doing our recreational activities, ready to take advantage of an encounter, but not specifically looking for one.
MIB