It it were me, I would ask to see them, then edge search them right in front of the teller... (discreetly of course). Pick out any silvers and don't take the rest... they are kinda hard to dump. That is, of course, assuming they aren't in rolls.
HH
BB
PS... I was joking about the quarters on that other post. If you read the previous posts on this forum, you'll find that most agree that halves produce the most silver. Unless you live in a place that is dismal for halves, like maybe Arizona... then probably dimes. Good luck. Be patient. The more volume/work you do, the better results you will have!