Enid Blyton's Are We There Yet? The Family Series (6 Books in 1!)

Mike, Belinda and Ann love the summer holidays. Every year there's a different adventure in store. Whether they're exploring idyllic Seagull Cove, cosying up in the family caravan, gliding down a narrow canal in a houseboat or sailing the high seas on a glamorous ocean liner, they know they'll always have fun. And there's bound to be something delicious for tea!

This is a bumper bind-up collection of all 6 books from the Family series:
The Caravan Family
The Buttercup Farm Family
The Seaside Family
The Pole Star Family
The Saucy Jane Family
The Queen Elizabeth Family