It is a very sensible system but I still could not wait to get out of the White Mountains. Why? The chores in the huts were usually quite simple: In my case I had to clean the freezer which was done in less than half an hour. And getting a huge amount of left over food (that has to be carried to the huts on foot by the wardens!) in exchange was a very profitable deal. But at night I had to wait till the last person went to bed until I could roll out my sleeping bag and sleep myself - only to be woken a couple of hours later by the first early risers. I mostly tried to stay at the very basic camp sites where the warden was either absent or told me he had no chore for me and let me stay for free!