Cool photo, Bob.
HK, I appreciate your ambition. Catching a redfin on rod and reel is going to be difficult. I'll help you out as best I can. I never targeted redfin specifically, but if I did, I'd do this...
I'd get away from where the chainsides are, go to a bog with a sandy, shallow bottom and not too much spaghum moss. Preferably, a high bank (like a high land bridge) and I would try to actually see if I could spot any redfins from above. Look for sedges along, or in the water. Redfins will most likely be looking into these sedges especially if they are at the water's edge. If you see a chainside, move on, the redfins won't be near a chain. I'd use a small hook with a very small minnow (a minnow trap might be necessary) and I'd place it about 12" from the sedges, or 2' from the fish if I spotted him. This isn't the optinum redfin environment, but perhaps the best for catching one.
If that did not work, I would go to a bog or lake with cedar growing in it and stagnent, dark water. Not a full on cedar swamp though. In this case I would experiment with live bait (no worms) and shinny lures (but don't get snagged).
Another idea is to wait till the sunfish are spawning. locate their nests in the sand and cast beyond the nesting area and slowly work the bait in. Don't cross the nest though.
these suggestions are based on experience and thoughts on isolating redfins from the other species. I will PM you some locations. Good luck!!!
Jeff