Favorite board games, ranging from Monopoly to Scrabble, are an ideal way to while away the hours. Camping is a great time to introduce new favorites, too. The Camp board game, for example, pits children and parents against each other as they identify animals and learn other outdoor facts.
Being together as a family doesn't mean providing constant entertainment, though. Pack some blank notebooks and pencils, and encourage your children to sketch or write during designated quiet time. A bottle of craft clue can secure a few found objects like leaves or twigs to a page, and voilà! A back-to-nature scrapbook.
If you already feel like you've maxed out your gear allotment, pack a few space-conserving card games like Uno. Or, play thinking games like "I Spy" that don't require any cargo room at all.