I have stayed alone a few times and yeah it is a little creepy. I stayed one night at #56 (burnt spruce) this summer on a Saturday night alone. There was no one staying at 57 either so it felt really strange. Part of me wants to be alone and then again part of me is a bit happy when I see another tent there. I think the more I stay alone though the more used to it I would become.
I like the Osprey's too but I have a bigger old heavy Gregory right now. My next pack will be an Osprey.