If you are a family tied to the labor movement, you may want to include pictures form the history of labor or past labor day picnics as part of the decoration. Use flowers that can be planted later like mums in colors that make the tables radiate and foreshadow the coming of fall. Centerpieces can include the flowers in baskets with moss and twigs as well as greenery from your bushes. Use brightly colored plates and large stems for glasses. Roses in small crystal bowls with name plates and your favorite flowery china and good crystal will paint another picture but a lovely one.
Labor day means games for the children and adult friends.
Think of how to incorporate them into the day. You can have swimming races if the pool is near by, or three legged races in the meadow. Egg on spoon races are also fun, or child on shoulder races make for memories. Try a long walk before or after lunch. The entire family can enjoy that and bring back leaves and twigs.