The symposium coincides with the Amsterdam Marathon. This event attracts a large crowd to the city and thus creates a large pressure on the available accommodation.
Most accommodation in Amsterdam can be found via booking.com or airbnb.com
In case it appears difficult to find a place of your liking, one can consider finding accommodation in a nearby town with a direct train connection to Amsterdam Central Station.
Suggestions are:
Zaandam
13 minutes by train
Hotels:
Inntel Hotels Zaandam (next to station)
Best Western Zaan Inn (next to station)
Haarlem
15 minutes by train
Golden Tulip Lion D'Or (next to station)
Amrath Grand Hotel Frans Hals (farther from station)
And several more.
Utrecht
24 minutes by train
NH Utrecht (next to station)
And several more.
