Puckster, in my opinion, it's worth it. Structure off to the side shows itself. You don't have to go right over the top of it to know it's there. That rock pile hump 30, 40 or whatever ft from your trolling path... Maybe you're the first guy ever to see it. Mark it as a way point so you'll be able to back to it time and time again. Only trouble is, you'll spend more time staring at the screen which means snesking back to that hump, anchoring and dangling a jig or slip bobbered leech in front of those eyes, or that giant school of small mouth, or that humongus pike looking for an easy meal. That's my story and I'm stickin to it. Enjoy!
C.C.