For the caravan itself, most static units come with a cooker, fridge and basic kitchen equipment, but tea towels, washing-up liquid and bin bags are worth throwing in your bag rather than assuming they'll be there. A torch is genuinely useful for evening walks back from the clubhouse, and a few games or a pack of cards cover the odd wet afternoon without anyone reaching for a screen.
A static caravan is bigger inside than most people expect from the outside. Most units have a separate living area with a sofa and television, a kitchen with a cooker, fridge and the basics you'd find in a small kitchen at home, and two or three bedrooms depending on the size you've booked. It's closer to a small, self-contained Tingdene Holiday Parks cottage than anything resembling camping.
Packing for a coastal caravan holiday is really about planning for a British summer rather than a guaranteed one, so flexibility matters more than any single item on the list.
Finally, ask about parking, whether each unit has its own space or whether you're sharing a car park a short walk away, particularly if you're arriving with a car full of luggage and a young family in tow.
The key decision is how you split everyone across accommodation. Larger static caravans, often three-bedroom units, can comfortably sleep a wider family group under one roof, which suits families who want everyone together for meals and evenings but still want separate bedrooms for a good night's sleep. If the group is bigger still, booking two adjoining or nearby units, one for grandparents and one for the rest of the family, gives everyone their own space to retreat to while keeping you close enough to wander over for a cup of tea or to hand over the children for an hour.
Finally, build in some low-key entertainment for the evenings, cards, a board game, or simply making the most of a park's clubhouse if it has one, so the whole group has something easy to do together without anyone having to organise much. Get the accommodation split and the pace right, and a multi-generational break becomes one of the easier family holidays to plan, not one of the harder ones.