This seems like a good time to share this tip/idea for fishing in heavy currents.
I'd never seen/heard about it before.
Last year on a  trout fishing trip to the Muskegon River in MI, I was wading the river and ran into a guy in a custom riverboat who was just killing the fish using this technique.

He came over to talk and it turned out he was a retired Air Force officer who was also a river fishing guide for many years.
He was using this for trout but I don't know why it wouldn't work for any other species in the same conditions with the right bait?

You take a steel lipped body bait like a Hot-in-Tot and remove all the treble hooks. You paint it black.
Where the bottom treble hook went, you attach a Duo-Lock type swivel.

You tie on a leader of whatever type line you like about 3-4 ft. He used fluorocarbon.
Tie a hook on the end. He used a small red circle hook for trout/walleye.
He was using a chunk of night crawler but said a live minnow or even Gulp type bait would work.
Cast DOWN stream and set flip the bail when the body bait is where you think fish might be holding.
Lure will dive and rattle against bottom structure with the bait holding just off the bottom.

A little practice and you can make the lure walk sideways across the hole, covering more ground.
He was anchored in boat and would  work a hole for awhile, then let it free spool and move it down to the next hole until he thought he was getting too much line out.

He'd then lift anchor, drift down and start all over again. Beauty of the set-up is that it holds bait close to bottom, is almost snag-proof and offers a very natural presentation.

I bet it could work in the Q/BWCA in the right conditions. I also think and will try it out my next opportunity in the Q, to use it for trolling with a Gulp minnow on a Walleye harness and being able to depending on size/diving depth of Hot-in-tot, keep the harness at desired depth? Maybe use a floating type waldo harness to keep it even more snag free?