Gem, funny how those year's go by, I could never understand how a lure like the Hyper Striper was so effective, with so little of action, but the Walleye assassin, made them so much more, when you would lose the walleye assassin, they would not hit it, must have been the action from the tail.
Dallas, don't just think 50' in Bullfrog in March, I have had good fishing in 16 ft in March trolling. Be willing to change, and try spoon's or deep running lure's, that bang off the bottom. I was over looking the shallower water year's ago, but not anymore. Some time the reaction bite from a flicker Shad or more aggressive lure, will work, when the Hyper Striper, or maybe Mojo won't. And you can get down to fish in 16 to 30 ft, a lot quicker then 50'.