A good grass field is the best but good grass fields are nearly impossible to find. At a high school level you will never play on two grass fields that are equal, and hardly ever a truly good (level, flat, good grass, well maintained) grass field. Especially at smaller schools where you are playing on weeds, dirt spots, crawfish holes, and uneven surface. Turf is best for high school is provides the most consistency across the board. Grass is better at higher levels because it can be maintained to the proper standard.