Hi. I haven't been to an organised party there, but you don't really need one. You can just take your own food and have a great day out. The entrance price is something like £9.95 per person, but if you have 15 people it reduces to £6.95. I know this because we had a family get together there recently. On the board outside it says parties of twenty or more for reduction, but the website says 15 and the tills are programmed to give the discount for 15 people, so the board outside is wrong. Hope this makes sense. Have you ever been to Crealy? There's loads to do.