I'd also remove any carp and redhorse suckers caught, as a general rule.
Regarding the Smallmouth, I'd try and get some into the lake mainly because that's my favorite fish. I'd also try and put in some HSB (Hybrid Striped Bass). The timing of that may be better done after you've taken more corrective measures, or not.
Regarding the Electroshocking, I'm surprised that there's not some local sources as you said. I think you could find a source through the Pond Boss Forum. You might also be able to get the State of MI to do some if you have any good contacts there.
All of the suggestions we're giving assume you can spend some money towards your goals, but if budget constraints are a concern, then you'll need to form up a team of people to help.
