I think we fisherman put way to much emphasis on attractants to catch bass. Predators like bass don't swim around smelling for prey. The sense of smell/taste although very acute is low on the list of senses used in a feeding bass. Sight, hearing, feeling and electroreception are the main factors in determing attack on prey. Smell/taste is of most importance only after bass attack the prey/lure. And this is only important on slow moving lures like worms, jigs and some swimbaits. Bass do hold on to prey/lures with smells they are accustom to and reject lures they are not accustom. So any natural scents like shad, minnow, crawfish ect. would be logical choices, but the use of scents is much more important as a masking agent than an attractant. You will catch more fish by reducing negative factors like gasoline, sunscreen, insect replellent, fragrance and nicotine from your hands than the use of scents on lures. You will catch just as many fish by applying scent to your hands as applying scent to your lures.