Coming by airplane: Bruxelles airport (or Charleroi-Bruxelles South airport) are closer and cheaper flights than Paris.
Easy connections by trains to Lille: direct trains from Paris CDG and from Charleroi; from Bruxelles National Airport, change in Bruxelles Midi. Trains: Direct trains from London, Paris, Bruxelles, Marseille. Easy train connections from Genève, Amsterdam, Köln.
Lunches at "Restaurant Barrois" on the campus (R1 on the map).