Suckers are great gamefish! They are every bit as good of fighters as catfish. They are also great to eat but because of lots of small bones, they can't just be fried as many fish are. Read the book "Fishes of Minnesota" to get some ideas about cooking them.
Also, don't let everyone talk you out of your ideas, they all have validity. Most people think that there are only a few gamefish species in this country. It is all in their minds!