It's also a very wrong statement. Additional sources tell me that he spent some time chatting with them around a campfire (also suspected in the 1981 murders, but I don't believe confirmed). He met them on the trail.
This was cold and calculated. I suspect he went there knowing exactly what he was going to do, and didn't care who the victims were.
Agreed, he’s a psycho, I stated that MOST murders are of someone known, a crime of passion.
He actually wrote a murder note in 1981 along the lines of “I like these people and I hate that I am going to have to do this to them”.