I use modern bowfishing stuff on my glass recurves and a tape-on reel on my primitives, usually. To me, the ability to cable an arrow makes more difference than the real as far as safety.
It's all gotten lost and kicked apart now, but I once made up some bowfishing stuff based on Amazonian tackle. Big long, bamboo arrows, well over 5' long and 3/8" on the small end, probably 1500 grains some of them. I used metal harpoon heads cut from mild strips of steel, some made out of big serving forks with barbs filed in (like a frog gig), and some made from really long nails in twos and threes, tips hammered flat and barbs filed in.
I was hunting carp in knee deep flats. Big fish swam away with the arrow, but never got far. I had a couple of them rigged with short lines and Coke bottle floats. It was fun to try a bunch of ideas.