Having previously had excellent suggestions for earlier in our road trip, I wonder if Mumsnet can help again! I'm looking for somewhere we can break a long car journey and let the wobbly toddler loose, ideally on some grass which isn't also a dog walking area. Preferably with a cafe and a loo would be good, but DH and I can sort ourselves out separately.
Things like garden centres, country hotels or national trust may fit the bill, but open to ideas.