When you are new, you have to be contacted by the Puy du Fou staff for an interview. You have to speak fluent French but to know german and English could be an advantage for you. But the main thing it's to be available for a long period...From April to September, you could have some hopes...But if you ask for two months for exemple between July and August, i think you have had it! The period, and as well it depends of your skills (reception, etc..). But i think now, the Puy du Fou staff has chosen its workers. Feel free to contact them in firstname.lastname@example.org
or the office with this number: 00 332 51 64 11 11
otherwise, of course there are some appartments available for workers like you, but i advise you to have a car to move... there is no public transport!