If you are fishing cut bait I don’t think you will need any sinker at all during low flow conditions. As I mentioned in my fishing reports, I’m drifting for channels on the St Croix and just using the weight of the cut bait and my snap swivel and barrel swivel to get the bait just ticking the bottom. My drift speed is probably the equivalent of a low to moderate flow current so the absence of a sinker should work if you were anchored. I’m still getting hung up occasionally so you know the cut bait is right in the strike zone. You would be surprised how far you can toss a cast with just a healthy chunk of cutbait on your rig. I haven’t had that much trouble casting out my baited rigs.
Last night we picked up 3 channels from 8:00pm to 10:30pm and they were nice fish (30″, 24″, 22″) and they just hammered the bait. We had quite a few hits and then they let it go, smaller fish I think.
I don’t know how effective this technique will be if you are towing a live bullhead without some weight to hold him down. I plan on experimenting with this in the next couple of weeks. I’ve got some smaller bullheads (4″ to 5″) that I am going to try drifting with.