Hi Dick,
As PB said, we run sliding cheaters later on in the year when we are going down 20' or more. Just a 3-5' leader with a swivel on one end and snap on the other. Hook lure to snap and hook swivel to your mainline. Give it a toss so the lure is behind your main line and it will slide it's way down to the midpoint. When a fish hits on the cheater, the rod will go crazy but it won't trip the release. Crank down, give the rod a yank to trip the release and crank like a madman until you catch up with the fish. We usually run 50' back, so there could be quite a bit of line to take in before catching up with the fish on the cheater. As Fishfarmer said, there are no tangles at that point since the cheater swivel will slide down to the main lure and then the fish is 3-5' behind the main lure.
You can also use rubber bands to hold the cheater a certain distance above the main lure. I will run the main lure down 5-10' with the rigger, then half-hitch a rubber band around the mainline. Put the swivel from the cheater leader through the loop in the rubber band and clip it to the mainline. Continue dropping the rigger to the desired depth. Now you have 2 lures 5-10' apart on one line.
Early spring, Perchbait and I will run 2 longlines and 2 in-line planer boards. Usually with a mix of spoons and small stickbaits. I will typically put a splitshot or 2 above the spoons and shallow sticks to get them down a few feet. I do have snap-weights, but haven't tried those yet.
Good luck! Hopefully we'll be getting out there before summer. This weather is going to set us back a while!