You should put Office de Tourisme 59 Nord into a search engine and then look for hebergement on their site. Because of the proximity to the UK, it is likely that you will be able to read the site in English. Alternatively put inHebergement 59 Nord and the name of the town or area in which you want to stay. It's worth having an atlas/decent map to hand as the accommodation may be in nearby villages or hamlets. Good luck!