Just back....weather was turning bad for a few days over there but its a lot worse here.
Paul, weather should be good for Sep. Hippocampe is a little smaller but everyone comes over to La Sirene from there anyway. Choice is really up to yourself. More facilities at La Sirene and I wouldn't let the teenager thing get to you...most were well behaved and the campsire was mostly Irish people there.
You should really book direct to get a better price than with Keycamp, etc. We paid €935 for the last 11 nights. That came with 27m2 of deck also. Flight to Carcassonne and car hire with Hertz. I booked a Pug 307 or equivalent months ago for €295 for the 11 days but when I got there they gave us a Zafira 1.9TDi for same money. I would advise you to do the same as if it is quiet they might just throw you the bigger car. They seemed to have very few mid size cars there anyway...mostly MPV's
I have the name of one privately owned Irish mobile home there but its a 3 bedroom. You should really go for the Cottage 2 which is what we had. Friends of ours came over from their site who were staying in a Keycamp VillaNova and they were amazed at the space and how well its laid out.
The pool area is fantastic and perfect for your young kids. We went to Argeles beach one day and up top St.Cyprien beach another day as my 2 boys wanted to make sand castles and the sand at Argeles was not to their standard
Night time entertainment is very good also and I did the archery which is free most days. Also the mini golf is free, but don't get caught behind any Germans...
We stayed in #132, but there are a few other Cottage 2's lying about. It should be quiet enough in Sep so you should have no problem booking now. I walked the site yesterday and made a note of a few other quiet located Cottage 2 units so if you are booking, then it might be a good idea to ask for a specific one if possible.
PM me if you need any more details