The campsite doesn't have any fixed times. You can arrive and set up when you want. You should warn the site caretaker when you arrive so that they may come to take your details and give the keys to the toilets.
Yes, animals are accepted, plus, there is no charge for pets on the Camping de l'Île de la Claise.
Yes, just next to the sanitory block, there is a staion to drain camper van waste and refil with water
For the time being the reception at the campsite does not have the facilities to take bank cards, but if you have no other means of payment,you may pay at the Mairie (Town Hall)