Relaxing National Parks Vacation Without Crowds This Summer | Sunshine Whispers. National parks can get crowded in the summer. When you travel with kids crowds not only hamper your fun but also pose safety risks. What parent doesn't dread the heart-stopping nightmare of losing sight of their child in a crowd of people? If you want to enjoy a day trip or camping trip at a national park with your kids but don't want to deal with crowds, check out our list of Best National Parks to Avoid Crowds. Cascade National Park, North Cascades National Park, Mount Rainier National Park, National Park Camping, National Parks, Travel With Kids, Family Travel, Family Vacations, Manassas Battlefield