photo: Avoncroft Museum - Tanya Dedyukhina [CC BY 3.0] / Cropped from original
Avoncroft and Webbs Garden Centre.
Avoncroft is an outdoor museum of historic buildings and period-planted gardens.
There is a wildlife pond, cider and perry orchards and a museum, shop and café.
Webbs Garden Centre has a food hall, restaurant and riverside gardens, and there are branches of Lakeland (cooking utensils), Hobbycraft and Cotswold outdoor clothing nearby.
Picnic at either venue, but if buying lunch, Webbs is more extensive than Avoncroft.