I was a bit skeptical of the advice you got for the shade cloth and constant misting. Yews are really tough. I've dug up five on three separate occasions, and got a recently collected one at a workshop. For each, I hosed the rootballs off to get as much of the field soil/clay off, cut as many roots, especially thick ones, as I felt comfortable with, and cut off a lot of top growth (I always leave some green on each of the thicker branches or sub-trunks).
Then, they are placed in Anderson flats, and if the rootballs are too big for the flats, they go into the smallest nursery container that will fit them. From there, they go into 100% inorganic mix, with full sun, watering every day as with my other trees, and heavy fertilization as with my other trees. The following year, I repot to further flatten the rootball and get out the remaining pockets of field soil that I wasn't able to get to the year before.
I've only lost one of the six yews doing this - and that was one that was collected from very dry rocky soil under an oak tree, and I wasn't able to get much roots on it. It was doing ok until I accidentally hit it with the lawn mower during that first summer and it got loose in the pot and died shortly thereafter (hadn't rooted much at that point unfortunately).