Face to face for sure, and like you were saying about finding out the history, ask about what they used it for, if it has been in the family long etc. I personally love to find out the history of classic vehicles, and I think if they have had it a long time I'm sure they will appreciate telling its story.
Good luck on the trucks, and don't forget the PICS if you get one, we are all picture junkies looking to score out next fix