When i was about 7 (30 yrs ago) There used to be a programme on a sunday night with a load of kids in a fort in Canada, can anyone remember what it was called, i keep asking people and the keep looking at me like im mad !!
Please give more details. Was it an adventure series? An educational thing? Was it presented by children? Did it involve sketches and 'how to' features? Was it a historical drama set in colonial times? etc, etc.
There was a programme circa 1960 called the adventures of the terrible ten, about some kids who lived in a fort or something similar, but this was in Australia, find out more at www.imdb.com
You are definitely describing the Forest Rangers. I think they were all orphans, and this Mountie would show up when it was too late and tell them what they *should* have done.