I never used the laundrette. Any sites I've used you need to bring all your own clearning powder/liquid. Make sure you keep change for machines or if it uses tokens I'm sure you'd get them in the shop beside it. everyone is helpful so I'm sure they'd keep you right.
Sorry, didn't use it.
Rent a caravan with a washing machine!
Not cheap. It cost us a fiver to wash and a few quid to dry. Avoid it if you can! Also you have to provide your own detergent.
Don't know sorry
It's between £3-5 and you have have to provide your washing powder. Make sure you have coins I believe it used £1coins.
Get an answer from Seton Sands Holiday Park - Haven staff and past guests.