Favorite cold-hardy perennial fruits for pots?

Greetings!

Does anyone have experience with any favorite perennial fruits in pots? How about some examples of both living and since gone?

I'm going to be doing more of this for the coming season - I'm wondering if peaches and some others in large (25 gallon or so)containers will survive thru a winter or few in zone 7'ish. They're going to be mostly on halford rootstock and a couple guardian - 3-4' in height. Protect them?

I've got blueberries, huckleberries, blackberries, mulberries, and aronia in containers... respectively having survived 5 years for the blues and 3 years for the rest.

I think raspberries are cold-hardy?

I have a cherry in a pot, and I know folk growing apple trees in pots. In a warmer zone, though.

Can you back them against a south-facing wall? The Victorian UK kitchen gardeners used to create micro-climates with south-facing walls and well-protected walled gardens, and grow warm-weather fruit that wouldn't have survived unexposed. I think they may also have protected the trees in the winter. You could wrap up pot and trunk in something (I like bubble-wrap though it is not breathable)?

(This is largely theoretical suggesting; it doesn't get that cold where I live.)

I'm in zone 5, so based on that experience, I would say definitely dwarf apples, dwarf pears, and rasberries would do fine. Peaches are more uncertain, but if you purchase young bare root trees, you won't be out too much for trying. I would definitely try to put them in a more protected location, like Juliet suggested with the south facing wall.

Please do share your experience I would be very interested to hear what works!

Jackie