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.
Bread Knife
Serving utensils
Plates. (Bowls, if necessary).
Wine and water glasses. Sturdy, reuseable plastic works well.
Corkscrew/Bottle opener
Spare Cork. If bringing champagne, resealable stoppers are a great idea
Can opener
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.
Garbage bags
Sunscreen
Insect repellent
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.
Flashlight
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
Cheese
Grapes
Salami
Crackers. When you run out of bread, these are handy