Picnics take time. Time spent together is the glory of family holidays. But you must also remember that during a long day spent outdoors, the weather in many regions can change quickly, so wear layers. Peel clothes off and put them back on as the clouds move across the summer sky and daytime turns to dusk. Picnic blankets with a waterproof underside are fine for children and athletic adults. Take fold-up chairs for the elderly and infirm.
Unless you're planning a barbecue, prepare veggie and nonveggie food in foil wrap. The great British sandwich was invented for just such occasions. Try cheese and cucumber, salmon and cream cheese, ham and tomato. Take finger food, such as potato chips, dry-roasted peanuts, olives and dried fruit. A cooler is fundamental for all types of drinks (also for candy bars). Make sure you take plenty of water and if it's cold, a thermos of coffee.
Whether you picnic with a hamper or carry your stuff in beach bags, the essential items are disposable cutlery, plates, cups and napkins. Wet wipes for toddlers are also great for cleaning greasy fingers, and don't forget the corkscrew. A Swiss Army knife will usually come in handy. You should also pack a medical kit. Nothing fancy: bandages, analgesics and bug spray are the staples. Check also if people have allergies or are taking medication.
The point of a picnic is to escape daily routine and plug-in technology, so your choice of a picnic site should determine the things you do. Group games are best, including trivia quizes, playing cards or baseball. Finally, a word about garbage: The rule is to leave a place as you find it, so take your garbage home or to the nearest disposal point and allow others to enjoy the same great holiday day out.