There is lodging of all kinds and for all kinds of budgets in Deventer:
Hotels, B & B’s, etc. (This is the webpage of our local tourist information office with nearly all the lodgings in the area. It is in Dutch, but you can get an idea of what is available and for what price.)
Participants have been happy with Hotel de Vischpoorte, Adamshof and Het Papenhofje.