In spite of the many trips I've taken in the B-Dub and Q I have only heard wolves once, on LaCroix, while out camping.  I have a friend who goes to Basswood yearly; 2 of the past 3 years they have had wolves IN CAMP.  Once the wolves seemed to be casing the camp for left overs and once the pack chased a deer right through the camp.  When campers got thrown into the mix the wolves retreated and the deer swam away.  Other campers have also encountered the Basswood pack.
We live on the south western edge of the BWCA and have our share of wolves.  My husband used to go outside at night and howl for them...partly to drive the neighbors dogs crazy...but the wolves often answered once he got them started.  You could try "calling" them.  :)