Hi Olive. Just wondering if you are all under 16, how you are planning to get to Eweleaze. Are you getting a lift or going by public transport because obv if the latter you will want to pack light. Assuming you are without a car generally you might want to head for one of the car free fields like Point Field at the end. It has great views from parts of it and direct access down to the (stony) beach. Take jellies or wetsuit shoes for the beach and sea would be my recommendation.
There are normal loos and showers around the site but the ones in the fields are compost so be prepared for that. Take loo paper in case it has run out and hand sanitiser as the water in the fields is cold.
You can have campfires at Eweleaze and they sell wood there but if you do have one, you should use a bit of the field which has already been burnt to save ruining the grass and be sure to put your fire out properly with water before you go to bed. For that purpose and just generally for water, take a large water cariver. Many camping shops and pound shops too sometimes sell folding water carriers which are ideal. If not you can just buy a big 5 litre water bottle in a supermarket and when the water is gone use that as your carrier.
I would definitely stock up on basic food and drink before you arrive as the site shop is pricey. Maybe between you get two or three one ring suitcase type cookers from Argos or Halford or a camping shop as you can cook pasta/rice and different sauces then, eg. Pesto, bolognese etc and all eat together.
Bring some plastic plates and cups from home if you can.
You will love Eweleaze and camping, so have a great time. When are you going? We will be there the first weekend of August.