Prayers for the family and all involved..
I was a scoutmaster for about 7 years. Based on that limited experience and the information from the MSM on this incident I would say that all were acting within guidelines. Some of the posters to this thread want us to spoon feed the kids their oatmeal every morning. The troop I was with had their own canoes and we used them extensively. I followed safety guidelines for water sports to the tee, but that is all I could do. I could not be in every location at all times, nor could the other dads I enlisted to help out.
My prayers are for the family and the mourning they are experiencing.