I can’t offer advice for your winter conditions since I am in 8B Oregon with milder winter compared to yours. From Brady’s reply above it looks the bush will survive when planted in a wine barrel in close to your conditions out in eastern WA.
Last year I got a couple of old Northern high bushes from a local farmer. These bushes were probably 10 or 12 yr old, they had okay rootball that was sitting in the field for a week before I could pick them up, then they sat out for another week before I planted them.
I planted one bush in a half wine barrel and the other in a raised bed. For media I used 60% fir bark mulch also called as pathway bark, and 40% peatmoss. I added 10-15% pumice to the wine barrel reducing the amount of peat. I also added between 1 to 3 lbs of down to earth acid mix while mixing the soil. After planting mulched with 2-3" of fir sawdust. After they both leafed out, late spring about this time I fed them with 1 tsp/gal ammonium sulfate (1 gallon for wine barrel and 3 gallons for raised bed).
These bushes established well, bloomed and fruited nicely. Mid summer, I removed some of the old canes and they sent out new canes within couple of weeks. I think blueberries and raspberries are easy fruits to grow with high rewards. Hope this helps.
Look at this post for pictures from last year after planting the bush.
Bush this year
