A ReDo List for planning a picnic (portions courtesy of Gourmetspot).
Large blanket / tablecloth. For damp lawns, bring a tarp.
Napkins. Cloth napkins make a nice impression.
Paper towels. Or a few hand towels for cleanup.
Forks, knives and spoons.
Plates. (Bowls, if necessary).
Wine and water glasses. Sturdy, reuseable plastic works well.
Spare Cork. If bringing champagne, resealable stoppers are a great idea
Small cutting board / Cheese board
Water or Juice. Its good to have some non-alcoholic beverages for rehydrating.
Beverage Cooler. Freeze some water bottles before hand to act as ice
Perishable foods Cooler. There are many light weight bag style coolers. If you are packing a big feast and your cooler doesn’t have wheels, consider a wagon.
Candles. Citronella varieties can help fight mosquitos. Look for enclosed holders with a sturdy base. Tall tapers are difficult to manage safely outdoors, and exposed wicks are easily extinguished by wind.
Umbrella. The garbage bags can act as an emergency jacket if you get stuck
Sweaters. If staying later, it may get cooler when the sun goes down
Bagettes. These are an easy bread to break up and share
Crackers. When you run out of bread, these are handy