I don't think there is a different subspecies (gray wolf v. timber wolf). In MN they are referred to most of the time as "timber wolves". They've been in northern MN forever. Since they were put on the ES list nearly 3 decades ago here, the "official count" has gone from 800 in early 1970s to - 3,000 in 2010. We know that count is way low from the people who live in primarily northern MN see them thick as fleas and now they've spreading out into area further south.
They've caused deer herds in tough winters to plummet. Now in recent years they have taken moose populations down to levels not seen in several decades (very low). The "experts" who sit behind their desks and "study" the declines in these game animals say they don't know why the populations have dropped.... HELLO! Very big (150+ adult male timber/gray wolves) and their packs (seen up to 20 in big packs) can hunt anytime 7x24 365 days.
It's out of control here, too! But you can't take it into you're own hands. Like said, it only gives the wolf fanatics (worshipers) more reason to get Fed judges to stop reasonable state run wolf culling programs, like they did in several western states.
This is a long-term fight to take back state's sovereign right to manage it's own wildlife including timber/gray wolves. Work through the legal process, pressure your state/congress reps / wildlife depts and don't give into emotions or give up. We can and will overcome with science, reason and eventually the public on our side to put good management methods in place to get wolf populations down to manageable levels.