I think it was done by people who are very familiar with that area and the land the homes are situated on, it would have been dark, country dark and to navigate through all those cars and buildings where Chris sr lived would have taken familiarity with the property, they would have had to have known where doors to trailers were as stumbling round in the dark banging into things would have surely woken one or more up,
they had to have had a car and not drive too close to the homes as again the occupants would have woken if a car drove up to homes, but they would have known where they could conceal a car that was not noticeable for the time it took to do the killings, They were able to kill all 8 in 4 properties some in their beds which indicate they knew where bedrooms were and could creep up on sleeping victims in a dark house - to me indicating knowledge of the interiors of the homes
I think the motive and identity of the killers will come out of left field and everybody will be surprised at what eventually is revealed
they had to have had a car and not drive too close to the homes as again the occupants would have woken if a car drove up to homes, but they would have known where they could conceal a car that was not noticeable for the time it took to do the killings, They were able to kill all 8 in 4 properties some in their beds which indicate they knew where bedrooms were and could creep up on sleeping victims in a dark house - to me indicating knowledge of the interiors of the homes
I think the motive and identity of the killers will come out of left field and everybody will be surprised at what eventually is revealed