In a few hours my parents, my six year old niece, and I will be at Jellystone Park. At least I won't have to sleep on the ground like the guy above; we will be staying in my parents rather nice RV. I've never been one who liked camping much, especially in a camper with my family, but it's only for two nights. We will spend the day at Six Flags on Tuesday.
The website describes the park as:
If you like the idea of a family getaway in the great outdoors, consider Yogi Bear's Jellystone Park™ Camp-Resorts. You'll find a range of accommodation choices - from rustic to downright luxurious - to help you plan a vacation the whole family will love. And at Jellystone Park, you'll have access to all the amenities and activities we're known for.
I'm sure that my niece will love it.