North Norfolk is AWESOME!!!!
Definitely go for 9th September as the beaches are heaving during the school holidays. September can be glorious, just as nice as August.
Wells Next The Sea is a good area to focus on. It's a lovely beach for children with a cafe, toilets, beach huts, loads of sand when the tide is out, pinewoods with secret 'pirate' routes.
Go round to the west a couple of miles and you've got Holkham. The beach has no facilities but is huge. Set back from the beach is a good hotel/gastro pub, a great wine shop, and at the hall (owned by the Earl Leicester who owns most of the land round there including Wells beach) there is a really good woodland playground plus lots of deer just merrily walking around.
www.holkham.co.uk/nature-reserve-beach/the-beach/introduction
www.holkham.co.uk/visiting/woodland-play-area
Burnham Market is a lovely N.Norfolk village were all the hoy-polloi from London come to at the weekends. Lots of lovely boutiques and a fantastic pot painting cum traditional sweetie shop run by a lovely lady called Jane. (Not Mabel).
www.mablespaintpot.co.uk/home.html
Further round to the west you've got Brancaster beach popular with kite surfers.
After that the beaches aren't quite so nice but good for birdwatching.
Round to the East of Wells is Blakeney (no beach, loved by old people), Wiveton (amazing cafe with sea views and PYO fruit, although probably not in September) and Cley (good smokehouse and deli, pebbly beach and RSPB cafe and reserve and B&B windmill owned by cousins of James Blunt).
Holt is a lovely town with independent department stores, little boutique shops, great cafes. Duchess of Cambridge frequently seen milling around.
www.byfords.org.uk
The N.Norfolk railway is great. If the weather isn't beach worthy you can visit the National Trust Sheringham Park for a good stomp over the parkland then catch the train at Weybourne in to Cromer for a traditional kiss-me-quick seaside town with great fish and chips down near the pier.
Bewilderwood is near Wroxham and although a drive from N.Norfolk (30-40 mins maybe) is a huge woodland playground family attraction that people travel from all over to visit. It's especially worth a visit outside of school holidays.
www.bewilderwood.co.uk
Check these people out for excellent spec accommodation.
www.sowerbysholidaycottages.co.uk/index.php
www.blakeneycottagecompany.co.uk
www.barefootretreats.co.uk
www.wivetonhall.co.uk
PM me with any questions! 