This will depend on what the caravan park is licensed for. If the park only has a licence for holiday stays, you won’t be able to pitch up permanently. Some caravan owners take the opportunity to travel during off-seasons when the park may be closed.
If you want to live on a permanent site, you’ll need to find a caravan park licensed for residential purposes. Usually, these parks will be for static caravans but may also have pitches for touring vehicles.
You can also find parks with a mixed-use licence catering to holidays and residential living.