We always used a couple blocks tied to one end and a big jug or two on the other. I know we didn't contact anyone and I wouldn't be caught nowadays doing it without having the ok
We put beds in kylake, have never called anyone.We have saw a game warden a couple times while dropping structure and they never say a thing.We use wood and believe it holds more fish than plastic.
I'm fairly certain we used cedars. That woulda been 15+ years ago. We also sank some bags of corn but I don't know they done anything besides ruin good deer bait