We've stayed next door at L'Ardechois. Both sites are within walking distance of Vallon Pont D'Arc - a lively holiday town, with good shops and a weekly market. Both sites are on level ground, adjacent to the river, with their own boat and swimming access to the river. The pitches at Mondial are grassy and quite large - but haven't used the 'facilities' as only been as a day visitor when my son was working for Canvas Holidays. The site looks well cared for and is popular with families. There are (or were) one or two tour operator tents (Canvas and Eurocamp I think) a couple of years ago.
The pool is near to the road (which can be quite busy). It's not large, but is clean and well kept. There are organised activities from the site.
The whole Ardeche area is super - do as John says and canoe down the gorge (we bought our own canoe as we loved it so much). Stop off by the Pont d'Arc and picnic on the sandy beaches, whilst watching others negotiate the rapids. It's also worth a trip to the Pont Du Gard which is about an hour away cross country - drop in on the Cascade du Sautadet (spectacular limestone-eroded river) on the way there or back. The whole area is lovely - try to visit La Baume, the hilltop village of Sampzon, and the village in the cliffs at Balazuc.
Have a great holiday - and a very happy New Year.
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