FYI:

We will be staying here:  http://www.hotel-an-der-nordschleife.de/

I have stayed here twice, and aside from a sketchy Wifi signal, have nothing but good things to say.

Nearby options if you are unable/would rather not book there include:

• http://www.booking.com/hotel/de/blau-ecke.en-us.html
• http://www.booking.com/hotel/de/nurburgring-rooms-pinocchio.en-us.html
• http://www.booking.com/hotel/de/ferienwohnung-zenzen.en-us.html