A 33 year tradition in Frederick -  Frederick's 4th features regional and national entertainment beginning at noon on 2 stages of entertainment. Families from the surrounding region enjoy a day packed with amusements, activities and entertainment. Dunk a Frederick celebrity or take in the Volleyball Tournament – there is a little something for everyone. Pick a seat early, because the park fills up quickly for Frederick's one and only fireworks show at dusk.  Great seats can be found surrounding the swimming…