Easter extended family gathering - I'm trying to find a venue for lots of children (aged 9-15) to rush around outside but with somewhere for grandparents to take it more slowly and sit down at least some of the time. Somewhere within about 25 miles of Stafford because that's the midpoint of where we all live. Not National Trust because they're not all members. Something more like a good public park. Ideally, with a wet weather option in case the Beast from the East strikes again.
Any suggestions?