#1 call them as early as possible. meaning when you apply for tags or even earlier. Be fairly specific on locations or specific tracts of land. Do as much research as possible before. That doesn't mean searching the unit on forums and reading joe blows comments. Go to the game and fish site and figure out if they have general migration maps, staging based on time of year maps, population data etc. Asks basics on that...what trigger the migration in the area?...Date? Pressure? certain depth of snow etc.
Know generally what the last few seasons have been like...dry, bad winters?, etc. YOu could match that up with or without population data and ask age structure questions.
Don't ask "where would you go?" but you could ask "do you know any areas you would avoid?" That has opened up conversations with biologists of "there are no deer in that area" or I have had them say "the deer are very few and far between but age class seems better".
Basically don't take up their time thinking of questions. have 3 or 4 good questions they can elaborate on and feel the conversation out. I have had 1 1/2hr conversations and 10minute conversations. Just depends. Don't act like they have to take the time to talk to you...they don't...it isn't there job to help guys scout.