It's my sister in law's 50th in September, and her daughter's 21st. They want to have a family get together (12 people ranging from 10 to 75) and have left it extremely last minute to organise anything.
It needs to be based in the East of England - Cambridgeshire / Norfolk / Suffolk - and accommodate everyone for a weekend.
The only thing they keep coming back to is Center Parks at Elvedon, but the grandparents aren't keen and it is eye wateringly expensive, as we'll need 2 or 3 lodges and we'll be paying for a night we won't use as most of us need to be back at work/school on Monday.
Any amazing, not too pricey, ideas would be very gratefully received as we seem to be going in circles. SIL doesn't want to spend a fortune as she'd really just like to go away for a swanky weekend with her DP, but the 21 year old wants a family weekend as she's away at uni and doesn't see us all very often.