The only ones I have caught were while fishing the river I fish for smallies.
Great fighters and all returned for another day.
Guess I could have googled this, but really prefer answers from folks that have "Been There, Done That".
One thing I just found googling it . . .
http://fwp.mt.gov/mtoutdoors/HTML/articles/recipes/DrumandChips.htmI'm thinking they probably have really good water quality for them also.
I also found a site that mentioned that they hang with Walleyes
AND
Yes, they are called Sheepshead in some areas.