One step further would be to stick to single hook lures. Replacing treble hooks with singles will do less damage while facilitating an easier and quicker release. When school bass are the quarry, there probably isn't a more effective lure on the planet than a simple jig. Bucktails, curlytails, shad types and countless other configurations are prime examples of a barbless, single hook approach. Bigger bass are also drawn to the same varieties of jigs in sizes more attractive to their appetites.
Trollers have several options when focusing on fish-friendly methods.
Parachute jigs offer the same single hook advantages as other jigs. Tube and worm combos employing a single hook have provided me a fair share of keeper bass while still allowing me to release lip hooked specimens with minimal harm. Large trolling spoons are often equipped with or can easily be converted to single hook lures. With cut bait and eel fishing, the circle hooks have become a popular option. Once you become proficient with them, they are an effective and reliable tool in practicing damage control to the fish while maintaining a consistently high hook-up ratio.