The conference venue is a ten minutes' walk from the train station:
9 Square Jules Bocquet - Passage du Logis du Roy - Amiens
For accommodation:
http://www.amiens-tourisme.com/accueil/trouvez_un_hebergement
HEBERGEMENT_AMIENS_METROPOLE_1.pdf
For travel (2 options):
Amiens can be reached by air via Roissy Charles-de-Gaulle (CDG) airport.
RER B will take you to Paris Gare du Nord station. From there, a train will take you to Amiens.
From Roissy Charles-de-Gaulle (CDG), you can also travel by train to Gare TGV Haute-Picardie, and then a bus will take you to Amiens.
For more travel details, see https://uk.voyages-sncf.com