Try a 3 way swivel, tie off one end to your line, then run 2 pieces of fishing line thru the gills(attached to the other 2 ends of the 3way swivel, and out thru the gill plates, one on each side, then tie a trebel hook on each piece of fishing line coming out from the gill plates. you can hook one treble into the anal opening and one thru the meaty part of the rear of the fish ( near the back bone but not in it ) This rig sets the hooks farther back, so that when he grabs it from behind hes hooked. THe sunny will be able to swim freely as the one end of the 3 way swivel is at the mouth, and is the end that is attached to your rod.
This is a salt-water rig i use all the time, the bait swims true, lives a long time, and hooksets are almost guarenteed.
Just be sure to set it when he hits it, you dont want him swallowing it, expecially if you practice catch and release. Ive never tried it with a standard 5/0 or barbless hook, but im sure it could be done easily