By the end of the war Rønneberg and a small team camped out in a tiny cabin in the mountains hiding from the Germans and planning sabotage missions agains German supply lines. The cabin was rebuilt by Rønneberg in the early 1990s and given to the Hiking association which still maintains it. For a small fee you can spend the night, highly recommended.

Pictures: https://www.ut.no/hytte/3.1381/