Slowly let out enough line to feel your bait tick the bottom. Then take a turn or two on the reel so the crankbait will avoid pounding the bottom and continuously snagging. Two anglers can put two rods in holders and hold two more. Avoid tangles by making straight passes. Begin by working shallow and moving deeper each time until you connect with fish.
Lure choice is a matter of trial and error.
Start by matching the size and profile of the predominant bait fish. Lindy Shadlings and Storm Thundersticks work well also. But, experiment with size, shape and color. Brighter lures work best in stained water, natural colors are best when clarity is good. Speed can depend on water clarity, too.