sorry shouldnt have been so blunt without an explenation....cougar is tricky, hit and miss, if i was takin my son up who had never gone, i wouldnt choose cougar, sure there are nice fish in there but tricky, ask chuck....blue river res will produce 12-15" inch trout that will fight like native fish, should be able to catch a large amount of fish and have a great time with your son....good luck !!!!