The Longs Peak Council (now the Adventure West Council) never owned the property. It has always been a lease from the USFS being in 1950 for over 100+ acres. At some point in time the lease was renegotiated for a much smaller 25 acre area.
Regarding the radiant floor furnace. There are clay pipes that were placed in the floor slab that connect to each chimney stack on each end of the cabin. There is an opening at the base of the chimney's where a fire can be built (but no, do not try to shove a whole tree in there). The heat travels through the pipes to heat the entire concrete floor slab. There were times that folks in my youth when folks were a bit over zealous about stoking the fire. The floor became too hot to walk on barefooted. Alas, this can no longer be used for a couple of reasons. The floor slab now has cracks that allow smoke to enter the cabin. The west end of the cabin has a fireplace with a large hearth. The flue in the chimney had failed and made the cabin quite drafty. We placed a fireplace insert into the old fireplace to make it more efficient and to block the downdraft. We replaced the old pot belly stove on the east end of the cabin with a newer wood burning stove.
At one time, there was a camp director's cabin, and outdoor shower house with an attached boiler connect to a pump that pulled water from the lake and pushed it into the boiler. A wood fire would be built under the boiler to heat the water. I have never seen the director's cabin but we used the shower house in the early 1970's when I first became camping there as a scout. The boiler and shower were later destroyed and removed, I believe, at the request of the USFS. The pump house was moved from the edge of the lake to the location of a new well to secure the well head.
There was also a lifeguards tower and rack for canoe storage. These were removed when they were no longer serviceable.
In the southwest corner of the cabin there is a hole in a raised portion of the concrete that is plugged with a galvanized bucket. We do not know why it is there or what it's original use was.
@WYOBKR - I would really appreciate receiving the images of the document you have found and also how you came to find them. Thank you,