I didn't say MARK HIS SPOTS. Just a technique that works that time of year. Get a general depth and bait type and go with it. No, I never said I would take a handheld GPS out and mark spots. Isn't the purpose of a guide to learn a technique and then try it for yourself? How many people go out with a guide and then never fish the lake again or try the same techniques for themselves. Think before you type.