Steve,
Also went to Natura site last year. We thought it was idylic. True, it is a bit of a bind to get to and you need to take care,we took the wrong turn and had to travel along a very narrow lane for a few miles. If you like nature,snow capped peaks and wonderful scenery then this fairly small rural site is the place to be. The site owners are very friendly and speak quite good English. It has small 'honesty' shop, a bar, TV lounge and other amenities but is not your traditional, all singing all dancing French site. If you like walking, going on scenic trips and a quiet holiday, it's ideal. Lourdes is quite close and well worth a visit.Great for bird watching - vultures and kites in abundance and we also saw a Golden Eagle. It may not be everyones cup of tea, but we thoroughly enjoyed it and will go back one day. Incidentally, we took the Santander ferry from Plymouth and then travelled back through France, returning from Caen.
Hope this helps,
Huw