There is catfish in both the river and lake, probably not many in the river where you would likely fish though. They will be farther down the river where it is warmer. Lake has lots of catfish but not a lot of good places that you can have good odds of catching one. If I was going to try to catch one on the lake from the bank, I would park at the Lakeview lodge and walk down to the water behind the swing sets and fish around the logs that are pushed in the water.
A vote is like a rifle; its usefulness depends upon the character of the user- Theodore Roosevelt
Broken Bow Lake Fishing Guide