I know little or nothing about wolves barring watching numerous documentaries on the fascinating wildlife on the American continent.
In reference to introductions, or indeed re-introductions, what many forget in their enthusiasm to return the world to some mythological "golden age" is that the environment has changed, mainly due to mankind's activities, but even without interference nature is in constant flux. Yellowstone will disappear eventually, as humans we think in the short term, by which I mean a few hundreds of years but nature operates on a totally different timescale.
Here in the UK the Red Kite has been the subject of a re-introduction program, no doubt at great expense, artificially bred, artificially reared, and artificially fed to maintain their population. The simple fact is that, without our constant maintenance of the Red Kite, it would die out because the world has changed and there would be little to sustain their population, there were just a few million people in the UK when they last roamed the skies over this land, now there are close to 70 million people.
Now we have Beavers, there is talk of re-introducing Lynx and Wolves, maybe even Brown Bears. It's a crazy idea that doesn't take account of the reality of the situation.
PS. met a chap yesterday as I walked through the Oak wood who was complaining about all the leaves on the pathways, he said someone should do something about it before someone slipped and hurt themselves on the slippery leaves, can people really be so detached from nature?, it's autumn(fall) for heavens sake. Thank the lord for pastimes that keep some of us rooted firmly in the natural world.
