We were at Les Menhirs at Carnac in Brittany this summer with Eurocamp. Keycamp and Canvas Holidays also go there. Eurocamp don't have tents on that site but Keycamp do. We were in a caravan but have tented before and unless you get freak hot weather the tent shouldn't get too hot during the day.
The site is 2 minutes walk from the beach and 5 minutes from the town. There are pools, kids club (Fun Station) 6 days a week, bar, games room, shop and carry-out on site. The site organised entertainment and sport every day. There's a big supermarket 10 minutes walk or 2 minutes drive from the site.
Lots of people were hiring bikes as the area is very bike friendly but our kids (5 and 2) were the wrong age for that to work for us which was really annoying.

Hi

This sounds exactly what we are after.

I think the difference in price between caravan & tent is quite a lot therefore would prefer the tent option. Do they get hot at night? as that is my one dread with children.

Thanks for you advice

We were in a Eurocamp Cezanne caravan this year and it didn't work out much more expensive than a tent would be. The tents don't get hot at night. Our experience of a tent in Normandy was that it was cold and I know people who were cold in a caravan in August this year in Normandy.
Our reasons for opting for caravans at the moment are mainly because we have our own toilet and shower, but also because if it's wet (we had 2 or 3 unsettled days in a row this year) it's easier to dry towels, jackets, etc in a caravan. The caravans also have ovens.
We're seasoned Eurocampers so ask me questions.

Hi

Now I think of it I will definately opt for a caravan simply to have our own toilet & shower.

Do you know how hot it is in comparison with the UK in Brittany? I dont know if perhaps we should head further South to get more guaranteed hot weather.

Are there any other campsites you could recommend.

Thank you for all your help

Hi
Why not have a look at our place
we are based at Holiday Green in Frejus,which is midway between Cannes & St Tropez.
http://www.holiday-green.com
and our own site details below.
Mandy

Brittany and Normandy are generally warmer than the UK. We were in Brittany from 29th June this year and the first weekend we were there the temperatures were in the mid 30s. A few years ago people we know went to La Rochelle in the Vendee as the weather is usually very good in July and it poured for a fortnight.
A couple of people have recommended Les Ecureuils at Jard sur Mer in the Southern Vendee to us. We haven't been ourselves but it is meant to be very child friendly. I don't think Keycamp goes there but Eurocamp does.

If you are going to stay in a caravan just for your own toilet and shower thats quite an expensive option...we have stayed with both keycamp and eurocamp and ALL there sites offered are 4 star this generally means the facilites are spotless....we have styed all over europe and at everyone the facilites have been A1 with clean comfortable showers and toilets which are cleaned regularly....both tents and caravans both have there good and bad points....each to there own i suppose.....but we have not encountered problems with either and that includes staying in a tent through 3 days of heavy rain!!!! i'm sure you will enjoy whatever you do....good luck....

Don't restrict yourself to Keycamp have a look at Canvas as well. We have had a dozen holidays with them and no complaints.

Eurocamp's basic Cezanne caravan isn't much more expensive than a tent.
For us, the main reason for wanting our own toilet and shower is because of the age of our children rather than because we don't want to share facilities. I agree that on the whole the campsite facilities have been very good and clean but one site we were on had birds nesting in the completely exposed rafters of the toilet blocks and the droppings were everywhere.
We also like the ability to regulate the temperature inside the caravan (heaters if it's cool and fans if it's hot). With two small children, blackout blinds and mosquito nets on the windows are a distinct advantage over sun shining through canvas and wakening them at stupid o'clock.

this is a general site finder for France by Department

http://www.lescampingsdefrance.com/anglais/departement.php?DptID=62

this is a Personal site of a well travelled caravanner
http://www.caravantravels.co.uk/

this is a general REVIEW site about caravanning and Camping
http://www.clicreports.co.uk/

Then there's always my site too

Hi

If you want to save a bit of money, consider going with Camping Life -

http://www.campinglife.co.uk

They have a good selection of campsites in France to choose from in all the popular areas. The reason you can save money is that you can use Tesco vouchers towards paying for the holiday. If you have saved up £100 in Tesco vouchers, that's £400 towards the cost of the holiday.

Having saved for nearly 2 years, Tesco contributed £800 towards the cost of our holiday in France this year. Long may it continue.

We've been with Canvas but this time we are booking direct with the campsite who have their own mobile homes.
In June this year we paid over £700 for 10 days in the Vendee and it works out at £108 return through the channel tunnel and £280 for the 10 days in the mobile home, so saving us £212 simply for booking directly.
http://www.camping-ecureuils.com/

Taking Camping Cheques 'cos we got our own caravan to tug

Tunnel £98 each way independant

CCheques £10.50 a night

going for 17 nights

most expensive part
the boarding kennel for the dog
and
Red Pennant insurance BUT wouldn't go abroad with the van without it

hi

we have just returned from a short break @ La Croix De Vieux Pont - Berney Riviere http://www.la-croix-du-vieux-pont.com/uk/index.html

fantastic site ,plenty for the kids to do ,and in high season they have kids clubs aswell

lovely green setting with a lake etc

also only an hour or so away from Disneyland Paris
big thumbs up from us,we are going to return next summer