I’d find a little network of primarily catch and release walleye anglers and go fishing with them. Catch and release folks are more likely to share spots and those who catch and keep.
Off the top of my head, I’ll rattle off a few tips that have been useful:
Number one most important is fishing the top or the bottom of the break, rarely in between on the steepest part. What I mean by that is find a breakline that runs from 16-22 feet and try 22 during the day and 16 during low-light “prime time” periods.
Bigger is rarely better. Don’t be afraid to step down lure sizes.
Faster is rarely better. If finicky walleyes are getting spooked, try being subtle. Slow and/or shorten the lift portion of your Jigging motion. Watch videos to see how they do it.
If the mark comes up and looks at your bait multiple times, something is off and you should quickly try something else. Walleyes are known to “yo-yo”, or come up and look and go back down, and repeat.
Often, an approaching walleye can be triggered by slowly lifting the bait and shaking it. This can be just 6-12″. Rarely have I caught a walleye by Jigging a spoon right in it’s face. Jig to attract, and when they come, basically vibrate the bait and slowly raise it up. They’ll often kick it into gear and whack it.
Also, match the hatch. Perch is a huge forage for northern walleyes, as are tullibee minnows and baby bluegill. Speaking of bluegill, you know how to find those. Next time you’re out fishing gills, try some walleye spoons right at the top of the sharpest break you can find near your bluegill school at dusk and an hour into dark. Get a LED headlamp, preferable one with a dim red light setting. Those walleyes will come up from deep water and feed on those very same bluegills on some lakes at dusk/dawn.