There is Vauxhall Holiday Park in Great Yarmouth, its a short walk from the station, and the camp has a bus service that runs from the camp to the bus station in town (near there infamous chip cooked in beef dripping

)
Its not the cheapest, but the on camp entainment and facilities mean that you don't have to leave the camp if you don't want to.
http://www.vauxhall-holiday-park.co.uk/