Yes, a bunch of us went in the 60s, not sure of date. the centre was then along the coast East of Kristiansand. I selected walking/map reading rather than the water sports, I hate cold water!
With the "assistance" of our leader, a young 2 Lt from the SCLI we outwitted the DS for the whole two weeks and had a fabulous time holed up in a small town. Full details will be given if anyone is interested, at a later date. We had FUN FUN FUN.