If I were utterly alone in the woods, say, up in the mountains somewhere or out in the middle of the desert somehow.Reality and subjectivity
What can it be to be “utterly alone” without a back history? How did you get there? Where are your parents. You have had no contact with “others” until that point?
This thought experiment is flawed in that you have not taken into account of time – past, present and future.
I am not worried about whether you have chosen to isolate yourself from others or not. You are not a Biblical Adam dumped into a reality a midpoint. You are a being with past, present and future.
This isolation is not without a causal reality. You may argue for it. You may argue for a solipsism. But the existence and actions, see or unseen, do not make it more or less because of observation.
If observation is everything then whatever you may choose reality. But since we share a physical reality we work within it, along it limitations.
That is to say, I am accounting for a consciousness within and physical reality. What you seem to be suggesting is the opposite – a consciousness without regard to (or independent to) the physical reality.
I will say, no, there is no such a consciousness which is independent of reality.
Again, I will take into account that there may not be someone over the horizon. The chances are though if I travel far enough they will be there. I have met people to be sure. To make the effort to go all the way into the forest to hide from them is an act of knowing their existence in-itself. But the act of going into forest does not make them disappear as such.