I was going to mention jointed shad raps also. We trolled SR5's and SR7's last summer in crawdad colors and caught enough walleye to keep us going back.
You need to run the boat faster for plugs than what you do for spinner rigs. Plugs usually troll in the 1.8 to 2.5 mph range. We almost exclusively did the 1.8 mph and fished them 90 feet behind the boat. Pay attention to the dive recommendations on the boxes as those are the depths we fished in. A SR7 will be approximately 13 to 15 feet deep at 1.8 mph. You want to be close to the bottom, but not necessarily dragging on the bottom. The red crawdad is the color we preferred but the other crawdad colors worked for us.
We did not fish the Flicker Shads. Those are reputed to be equally good for walleye and are a tad cheaper.
Big Wally's or the marina/fishing lure shop in Electric City could give you pointers on the what and where info when you are there. The Electric City shop had a good selection of Flicker Shads when I was last there.