Packing for a self-catering caravan break comes down to knowing what the unit already has, so you are not left doing a supermarket run on the first evening for something that was sitting in a cupboard the whole time. As covered elsewhere, most static caravans come with a fitted kitchen including a cooker, fridge, kettle and toaster, along with enough plates, pans and cutlery for the number the caravan sleeps, plus basic lounge seating and a made-up bed or at least a mattress on every berth.
For families, items like a travel cot, highchair or stairgate are sometimes available to hire from the park rather than something you need to bring, so it is worth asking at the booking stage rather than packing something bulky that duplicates what is already on site. The same goes for pet supplies. A food and water bowl is sometimes left in pet-friendly units, but pet food, a lead and any bedding for your dog are down to you.
Entertainment is worth a thought too. Most caravans have a television, but streaming apps depend on your own login and a decent wifi or mobile signal, which can be patchy at some coastal and rural parks, so a couple of books, a pack of cards or a board game is a sensible backup for a quiet evening.
If you are bringing more than one car, check the policy before you travel rather than on arrival. Many parks can accommodate a second vehicle but ask you to park it in a general overflow area rather than beside the caravan itself, and a few charge a small fee for a second car during busier weeks.
A fully flexible rate typically allows a date change or a cancellation with a reasonable amount of notice, sometimes with a small admin fee, while a lower, non-refundable deposit rate usually locks in the price in exchange for little or no flexibility if your plans fall through. If a change of date rather than a full cancellation is likely, for example around school Norfolk Broads holidays or a specific event, it is worth asking at the point of booking whether an amendment is possible and what it would cost, rather than finding out after the fact.
Most parks ask for cancellation requests in writing, by email, so there is a clear record of the date you asked and what was agreed, rather than relying on a phone call alone. If you do need to cancel, doing so as early as possible generally gives you the best outcome, since many cancellation windows work on a sliding scale where the amount refunded reduces the closer you get to the arrival date.