Speaking in generalities since this is so very much a general, but interesting discussion, I agree with others who say getting walks won't get you noticed.
Getting a good pitch to hit and usually making solid contact goes a LOT farther than a walk-heavy OBP. Of course, a lead off and bottom of the order hitters will probably get more of a pass for qABs and walks. But some coaches despise their hitters looking for walks, and let's be honest--many umpires do too if it become obvious. Yes, I know all umpires should call a consistent SZ but at least the HS level, I see plenty of situational SZs that expand to help struggling pitchers and punish bat-grafted-to-the-shoulder hitters. That's just my experience, purely anecdotal.