There are no hotels in Warmenhuizen, so you will have to book something in the cities around it. Alkmaar and Schagen are good places.
One option is the Markstadt in Schagen, we are busy getting a good price for people to stay here.
For more information about Marktstadt: https://www.hotelmarktstad.nl/
There is a place to stay in Warmenhuizen, there is limited space there.
For more information about the Marlequi: http://www.hotelhuisjewarmenhuizen.nl/