I was a courier on Domaine last season and can thoroughly recommend the site.
The site is quite large (800 pitches) but only around 160 of those were taken up by tour operators so it has a very international and authentic feel to it.
Instead of of one big campsite there are a series of smaller shops to give a 'village' feel to the site. The quality at each of these shops is very high. At the bakery I can highly recommend a Swiss Longe. All of the site staff are very friendly - especially Pascal and Babbas in the bakery. Be prepared to be sung to as you by your baguette.
The campsite offers a good programme of 'animation' ranging from films, evening games, sports tournaments and a disco. It is aimed towards children.
In high season the bar has live bands regularly appearing - including an Irish band! :-)
If you fancy an afternoon of wine tasting head to a town called Arbois. It is the wine capital of the Jura and practically every other shop offers wine tasting. I can also recommend a trip to the Cascades Du Herrison. They are a series of waterfalls spread over a 2hour walk and are well worth a trip.
Local specialities are Vin Jaune and Comte cheese.
The campsite overlooks the lake to the west so after a sunny day the sunsets over the lake are magnificent. Even after spending four months on site they wre always breathtaking.
The area is fantastic for cycling and on the roads around the site you will be able to cycle without too many cars around. Bikes can be rented from the site though I'd recommend bringing your own.
Nearby are the towns of Lons-le-Saunier and Champagnole. this would be the places to go for supermarkets.
Trips to Geneva and Dole are a must. I have it on good authority that the drive to Geneva through the mountains has to be seen to be believed.
Being completely honest the weather can be somewhat unpredictable. I think all of Europe experienced a wet summer last year and we were no exception. However, because of the mountains sometimes only a ten minute drive will see a complete change. Often we escaped thunderstormed due to the shelter provided by the hills around the site. That being said far more often than not the weaher was fantastic and we were all suitably tanned come the end of the summer!
The campsite restaurant Jeremy's serves a good range of steaks (including kangaroo steak) which i can recommend. In nearby Doucier La Tonelle is a friendly local restaurant with fondu being it's speciality. La Lacustre is a pizzeria and the quality of food was fantastic. La Comtois comes very highliy recommended from all of our customers. On many different occasions people raved about the quality of the food there.
Pont-de-Poitte is the local watersports centre and offer canoe tours along the river.
A short drive away is the Col-de-Facille. On a clear day it offers breathtaking views of Mont Blanc. There is also a dry tobogan run for children.
Baume-Les-Messiuers is a very picturesque nearby town . there are caves to tour around as well as an impressive church.
I absolutely loved my time in the Jura and feel it should be recognised as a holiday destination. However, because of it being still relatievely unknown it is also largely unspoilt. If you have any questions feel free to rack my brains. It's been a while since I had to recall all of this - often on a daily basis - but it's amazing how quickly it all comes back.
Totally agree with Sean, this is definitely that lovliest large site we have ever stayed on - and I definitely plan on returning without the stepbrats.
The only thing I would add is that you should always count your change before leaving the dairy and - this could be particular to us - don't ask to borrow our map when driving into Italy for the day.
Oh and don't plan on being in Switzerland after 8pm (it closes).
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.