My relatives have a lovely family home in a Portland, Oregon - 3 bedrooms, outdoor hot tub, leafy, quiet neighbrhood - and they'd love to come visit us in the UK this summer.
If you don't know Portland, it's a hip little city with glorious weather in the summer, close to mountains and sea for great outdoor activities. They have two kids (13 and 9), so the house is well-equipped for families.
They're academics (me too) and open to swap June-August in different regions. Please be in touch if you're interested!