A man alone is easy prey . When observing at a remote location , I find it tough to give the eyepiece the attention that is needs for serious observation due to what could possibly sneezing up behind me . It really becomes a worthless venture to me because of that . Plus I enjoy a bit of comraderie with one or two fellow astronomers . Even if I was observing in the safety of a backyard , I still enjoy a bit of comraderie . If they flake out early , I'll keep at it till I'm ready to quit , but out in the boonies , the mountain lion can pounce without notice . Even if I'm packin a piece , I really can't concentrate well enough to make it worth while with the threat if a wildlife attack .
Good point. I live in northern Arizona which is both mountain lion and bear country. Last year there were three bear attacks near Payson. A human alone is a possible meal, two humans are a threat.
And of course for us near the border, human and drug traffickers are a real possibility, especially in the low desert. For those of you thinking that idea is paranoid, go to the Saguaro Astronomy club website and read the cautions on remote sites and observing.
Then there is the medical aspect. A couple of summers ago I had an accident where a portable pier with 275 pounds of equipment toppled over. Without the leverage to upright the pier, I threw myself under the mount to save the equipment. My leg took the impact from the equatorial head, just above the knee. I was quite fortunate to have friends to help get the equipment off of me (and equally lucky my leg was not broken). And with friends present, I was able to observe through their scopes until the swelling and the pain got he better of me.
I'll go alone but much prefer the company of a few friends.