Medhi the owner is spot on, you maybe better off on the AL website, that way you can chat with Medhi direct about the lake, etc. He normally responds within a day and will give you all the info you want.
I walked round the place in April when I was fishing Old Oaks (across the road), really nice place, only thing for my group is that the swims are a far distance apart so not great if you are going for a bit of a social. But well looked after.
Just for FYI, non of the shops open on a Sunday there. There are local shops in the next village Spay. Turn right out of the lake, follow the road into the village (5mins) until you get to a roundabout with a bar on it, which will be in front of you to the right, turn left here and then first right, which will take you into a small car park and you will find a small supermarket and a bakers. You'll get basics here, Medhi can give you direction to a bigger supermarket on the edge of Le Mans itself
Hope that helps