In reply to coldfell:
www.ariege-pyrenees-tourism.co.uk/camping.../ornolac-ussat-les-bains/
There you go - lovely site next to the lake and river, on-site canoe hire, and right underneath the Sinsat crags. John and Anne Arran of the UKC parish live in the village if you need any advice about the climbing, and Ax les Thermes and Tarascon are nice towns for sightseeing and mooching.
ps - if you use Google maps on the satellite setting, you can get a good view of the campsite.
HTHG, JW