Absolutely! As you point out, finding the right water where you can actually swing to them is a big piece of the puzzle.

It's no secret that coho love the frog water but they will often hold close to the head of those pools and on the outer seams where the frog water meets the main flow and if you can use the current above and outside to swing your fly into their preferred holding zone, coho will typically respond quite well assuming they are relatively unpressured and you are swinging something they want, etc.

Another way I target them swinging flies is to find some good swinging water where I know they will be moving through, though they may not be holding there. I have a few spots on local rivers that I know the fish always travel in although they never tend to stack up there. If you can prospect such fish traps and funnels where you know you will be fishing to moving fish in current that offers a reasonable chance of a decent presentation, again you'll be stacking the odds in your favor.

I've caught a fair number of coho swinging flies for trout in water that you would never think a coho would be hanging out it, e.g fast riffles and fairly shallow water, mainly because they were on the move and had to move through the spots somehow.

Like any other salmon fishing, first fish to greater numbers of fish, second figure out a way to get good gear properly presented and you'll get them. I am a firm believer in the notion that when salmon are present in any numbers, you tend to see them.

As for tackle, I've had the best luck (when actually targeting coho) with pink flashy stuff. Bulky marabou and rabbit with plenty of flash seem to do the trick just fine although I've probably caught just as many on the Dolly Lama.

Best of luck!