I definitely agree that a climb of Mount Cleveland with a camp at Stoney Indian Lake requires plenty of advance planning to get the required permit for the campsite. I've been able to do it that way twice though and it is a great route. Of course one has to get lucky with respect to the weather too. Given that climbers should check the availability of the campsite when getting their permit for other routes just in case it is available. There are three sites at Stoney Indian Lake and only two of them are reservable in advance so there's alway the possibility, albeit remote, that the third site might be available.
I've also heard that the elk trail approach to the Camp Creek drainage has been flagged. In my experience only the beginning of the trail was marked. Where the main elk trail leaves the Waterton Valley Trail is not as obvious as one might like.