Are you looking for huge camping tents? If your family is bigger than the average size of 2 or 3 kids and you need a lot of room, there are many great choices. What's nice about a lot of these is the fact that you can all sleep close together, but there are usually separate rooms available for a little privacy.
If you don't need quite that much room, there is a relatively cheap product that still falls into the large family camping tents category (sleeps up to 8 people), and that is the Suisse Sport Wyoming Tent. This tent is not only less-costly than a lot of the bigger models, but still has three rooms and is made from heavy duty, weather-resistant polyester.