We went to La Domaine De respelido in Cote D'azur through chez nous in Oct when DS was about 6 months.
They provided a cot and had a fully equipped kitchen with microwave so if you are bottle feeding you can bring those Lindam steriliser bags.
The best thing about it was jacuzzi & Sauna within baby monitor range, ask for the appartment closest to it. They also had a pool but because it wasn't heated it was too cold for us to use but generally weather was great for that time of year, September would probably be quite hot, we ended up sitting by the pool for some lovely afternoons with DS in the car seat beside us in the shade.
Oh and if you have started weaning by that stage they sell apple puree pots in the local supermarket, like yoghurt, DS lived on those whilst we were there, plus some Plum baby food that we had brought over.
We also arranged baby sitting a couple of nights through them but it was dear at 15 Euros per hour and there was a lovely relaxed family friendly restaurant within walking distance where we just bought DS along to a couple of times.
Also most restaurants do a lovely lunch time menu so we tended to go out then and have a bbq in the evening then go to the jacuzzi.
Would love to go back but next year DS will be running around and wouldn't trust him with the pool.