hello all. i'm gonna try trolling some crankbait's next week for some walleye. the lake is relatively shallow (15-20). we will probably be doing most of our trolling at night for the walleye. i was wondering what are some good crankbait's to try out. should i be using deep diver's or shallow diver's or both. what color's work best at night. probably be trolling by the dam most the time. this lake really doesn't have much for flat's or hump's...water is pretty clear.... color's, lure's, any info would be helpful. thanx in advance!