To arrive at Calais Ville railway station, it takes +- 1h from Paris Gare du Nord or 30 minutes from Lille Gare de Lille Flandres. Check the web site of the French railways SNCF for other departure locations. From Belgium, consult the site SNCB Europe. At the station, take the bus line 04, stop at Vadez.
If you arrive to Calais Frethun (Gare TGV) you must take a train to Calais Ville.
A16 exit Centre Universitaire. You can use either the parking P1 in front of the EILCO building or the parking P2 (close to the library).