I have stayed at Kelling Heath 4 times, in luxury lodges and privately owned caravans, and always enjoyed it. One visit was in a lodge with a ramp, suitable for wheelchair or scooter, with a porch for storage, which made life easier in wet weather. I believe all accommodation has heating, and lovely garden areas for parking and wildlife watching. I saw my first blue jay there. Deer and other animals wander freely, and there is a beautiful wildlife pond. It is nice to have the option to stay put and have a quiet day, without being bored. Sitting in the main forecourt with a coffee and watching the world go by is a popular pastime for some.
The camp site looks very clean and well kept, as well as being quiet and close to good views, cycle tracks and walking.
The roads into the park are wide, and do have speed bumps, but going slowly they are easily negotiable.
The heath has lovely walks, either on flat, bumpy or hilly terrain (you choose), with some gorgeous views over Weybourne and the windmill. There is cycle hire available, which I would check in advance for opening times and availability in high season. There is also a well stocked shop that sells camping equipment and grocery supplies.
There is a leisure complex with pool etc., which I have not used, but others say is very good. Some private lodges include this cost in the rental, or you can arrange when booking directly with Kelling Heath reception. There is a pub/restaurant if you do not want to cook in the evening, and the bar area serves lovely lunches.
You will need a car, unless being a keen walker or cyclist, in which case you will have plenty of choice in most directions. Nearby is the Holt railway line, so you can take a steam or diesel train (depending on the time) down into Sheringham. Bear in mind that coming back there is a steep incline to negotiate back up to the park.
Sheringham itself is flat near the shops, some of which are nice for browsing, and two of the best ice cream shops, selling all kinds of lovely flavours. There is a steep ramp down to the front. There is a coastal bus service, but this is some distance from Kelling, although it could be done in a taxi.
Weybourne is small, but some nice walking and reasonably flat, as is Cley Marsh reserve, a few miles away on the main beach road. Lovely food at Cley Visitor Centre, which is accessible, with gorgeous views and bird watching. The marsh is predominantly flat, and good for wheelchairs/scooters.
Wells is a nice, traditional harbour village, on the flat with good food available. Access to the sandy beach and the famous colourful beach huts is via some steep steps through woodland.
There are many places of interest, such as NT and private homes etc., as well as RSPB Titchwell and Brancaster.
Wifi is spotty at best in the park, but available in the main complex for free.
There is plenty to do for all ages: venturing out, staying in, walking, cycling or pottering about. I have walked, wheeled and scootered all over the park.
Worth checking the website to see when there are special events, such as Big Sky dates, when the skies are best for star gazing and astronomy.
Personally, I love Spring and Autumn, but Kelling, and Norfolk in general, is good at any time of year. For the purpose of this review I will put my dates as spring.