T Inman, your size comparison is not apples to apples. The photos I posted up are the Eastern Timber Wolf found in the Great Lakes states and Canadian southeastern provinces and tend to run smaller than the Gray Wolf of Alaska, Canadian western provinces and wolves introduced or immigrated to the lower western states.
Do you have coyotes weighing 60 - 110 lbs. in your neck of the woods? This is the smallest wolf the group I hunted with tagged, a 62# female.
You mentioned that entire packs of hounds were wiped out by wolves. Wisconsin has completed 4 wolf seasons and I recall learning of only a couple of hound casualties, and a few injuries.
Your question:
"When you all set loose, do you only do so on wolf tracks that you can reasonably conclude are from a lone wolf and not from those with a pack?"
Yes, that is the main objective.