you have lines 13 and 14 to choose. The walk to line 14 is longer (about 15 minutes to Mairie St Ouen) but it`s a much nicer and faster line compared to 13. provided you have a day pass you can also take the bus to the metro, if not it is unfortunately 2 different tickets. the walk between metro stop and hotel at night may not be to everyone`s taste - bus is better