Early in the season start shallow, and work out from there. How shallow? We will work Red and other systems with the prop kicking up sand, and a small shad or minnow bait only a couple yards behind the prop wash getting hammered by aggressive eyes. Now we don’t normally start in 3′, but somewhere along that first break; and meander deeper/shallower until we start getting action.
There’s definitely times for stealth, but for the most part if there’s any sort of chop an outboard doesn’t bother them a bit; and may attract them.
Switch colors often until you find what they like – assuming you’re using a lure that’s reaching target depth. Preferred color changes throughout the day.
And, regarding depth – there’s a lot of wiggle room there. We typically troll with spinning gear unless we’re pulling boards. No need for line counters, etc for the majority of early season trolling. Cast the crank back, if it starts smacking bottom reel in a bit. It’s that simple.
Warning – you many need to join crankbaiters anonymous like we have, because once you start catching them you’ll be addicted; and the 3700’s full of lures will start adding up! =)