We used to visit my wife's godmother who lived in Cromer and stayed at a C&MC CL that is very nice https://www.churchfarmcottagesnorfolk.co.uk/caravan-site/ From there it's only a short drive to Dom's.
I don't know if you have used the Harwich to Hook of Holland crossing, which I'm guessing would be your preferred crossing to Denmark if going by car, but it's excellent value especially if booked early. Another C&MC CL is ideally situated for this crossing https://www.caravanclub.co.uk/certificat...ich/brookcroft/
Hope all works out for you.

Colin