There is no such thing as a dumb question. I've heard reports of people catching fish in the canal but I would imagine most people take the canal as an avenue to the lake. I've only been out on Calumet lake a couple times and those times we went out we always just drove straight to the lake not stopping in the canal at all to fish.
There are no fish in the Cal Sag they have tourneys there just fun. LOL From ACME steel to the locks,Lake Calumet and all waters to the lake have fish some NICE ones .If you go to the Big Lake great smallie action at times Lake Calumet has them too.