Well, I haven’t done it for a number of years.
It’s easiest when they are feeding on the surface although they are spookier. Just sight fish to them with a dark color fly. I’ve had the best luck with a black nat in size 10 or 12. But I’ve used a timber wolf pattern black and gold too.
I’ve found pods on the croix (afton area) and followed them with the trolling motor. Problem with doing this is if your fly falls through the carp pod, many times a smallie will grab it…pesky little things!