If I am going to fish a part of the river for blues and channels, where the depth ranges 4 to 90 foot everywhere and quite quickly, what depth would you try to find holes at in this situation? Or are they going to be everywhere.? I don't know if trying a lot of holes at 50or 60 feet is worth it or if I should consentrate at 20 and 30 foot range. This is a new part of the river to me so I am clueless. I am used to fishin 20 foot max depth.