Initially Tenny was opened as "Senior Camp" with special programs for older Scouts.  The first description we discovered about senior camp appears in the 1939 handbook.

In 1952 and for at least most of the 50s Tenny was the only "troop" site - the other six were all provisional.  

Later in the fifties Tenny was used for older scouts one summer - Don MacLean was Scoutmaster and had the boys running an explorer post program, from program planning through older-boy activities.   That crew cut the red trail from the Tenny Belle all around, by the "dutch wall" past the glacial sink hole, by the red pines, and back along the shore through the campsite.