Jeff,
Spreaders work as do crappie rigs and skipper 9 rigs(need to ask skipper for a picture). Basically anchor your boat and drop the spreader or any rig to the bottom and crank it up until you can tell the lead is off the bottom. The perch hang really tight to the bottom most days and they will suck in the shiners. Make sure you get emerald shiners(most all bait shops carry them along the lake) and if they are big you may have to cut them in 2. The perch will bite fairly light. I use a 7 ft med light pole with 6# mono. You will catch sheepshead white perch and white bass as well. An ultralite set up will work too, just be careful as the sheephead can get pretty big.

Also we sometimes leave the motor running at idle to help keep the perch active, as well as hook one and let him swim around below the boat. It seems to attract other perch. I also know of guys who have perch callers that they rig up to drop to the bottom to stir up the mud as well as make noise.

As far as size goes, my boat rule is anything over 8 inches, but it is a personal preference. We are allowed 30 in ohio. I fished for perch last sunday and did ok with mostly 9 and 10 inchers. I was fishing SW of West Sister island. Typically the further east you go, the better the grade of perch. Kelleys island is a very popular spot and lots of guys on this site will attest to that area. I stay in the extreme west basin so I cannot comment on the fishing down that way.

Good luck, and post your results!
troy