I will admit, in someone else's house, (especially in a town or city) or a motel I can't sleep past first light, and my sleep is very light. First night camping in a tent I'll not sleep well, wondering if each noise is a bear, then after the first night I'll sleep like a log, sometimes better than at home, if that is possible. Like, if the bear don't come the first night I'm safe. !!!!???
Can't remember the last time I ever had to sleep without a firearm within reach, maybe a hotel in Canada when me Mum was still alive, but I don't think I could do that now. That would be one dreamless, fitful night.