To spray or not to spray

Weather has prevented us from spraying our hayfields of fescue orchard mix with 24d. Now a lot of the grass is in late boot stage to early seed emergence and around 2ft tall. We've been very fortunate to never run into this situation before and I'm not sure if we should attempt to spray this late in the game. My main concern is running over the grass and doing more harm than good. I would be using Weedmaster so I would only have to wait 7 days prior to harvest. Interested in knowing what you guys would suggest in this situation.

To spray or not to spray