I find it strange that so many people think being out after dark is an odd thing to do - we have often done a walk in along a track after arriving somewhere after the 4 hour drive after work on a Friday night. I've always loved it with no uneasy feelings at all. The sun has gone away, and there are different animals about for sure, but there is no danger to fear.
I had an experience in Ben Alder Cottage - the 'usual' clattering about from the other room, with no sign of anyone on inspection. Couldn't get a fire going that night either which is unusual. The BAC ghost is well known for being harmless though and I got a good nights sleep.
Scariest night was at the bealach between Beinn a chroinn and Cruach ardrain near Crianlarich. Woke up in the morning to find a sheep carcass just a few metres from the tent - freshly picked clean of almost all flesh.
Could only have a supernatural explanation surely (Or slightly more likely - one of the fabled big cats)
A near escape anyway