The Fete Du Champagne is a Great thing to Experience, with or without Kids.
Basically a different village each year is selected to host the event, the village is closed off to all traffic from Friday to Sunday and becomes one great big traffic free area , each Champagne House opens up its doors and puts on a unique celebration of its Wine, including music , food and entertainment in many.
The event runs all day into the evening.
You can see the vines and explore the area on foot.
You can buy a book of tickets (at the event) which includes a little bag and a wine Glass you carry with you) (50 euros approx - see website for current costs) you can then explore the village and vineyards (walk around a sign Posted route in any direction you like or make your own route). - edit buying a book of tickets is not Madatory , you can experience the event for Free. Similar you can buy glasses of Champagne individually if you prefer.
When you enter a particular Champagne House, present a corresponding ticket to the Particular Champagne house,they will swap it for a glass of Bubbles (poured into your Glass The book of tickets is valid for the whole of the Event. It's a great waty to experience the Miriam of Flavours and types of Champagne.
You can purchase Food , Bottles of Produce and souvenirs en route, soak up the atmosphere, listen to a live group or two, see the Wine making facilities and processes etc.
The Vibe is very relaxed party and very convivial.
I went several years ago with two teens, we all enjoyed the whole unique French experience, we didn't stay onsite on that occasion.
We are returning this year to stay within the Village to get the full experience.
Details of the chosen village event are released very gradually. Including location , camping details etc, which are usually released a few weeks before the event.