Next prime night at Columbus dark site will be 26 April 2014. The forecast for Saturday is not looking too good, but let's hope it improves. I'll make an announcement on Thursday or Friday about the weather for prime night.
The weather for Friday night (25th) looks good at this point, and the moon on Saturday, 3 May, is still good with only 22% illumination and setting at 00:09.
Here are the ephemera for Satuday, 26 April:
End of evening twilight 21:26
Begin of morning twilight 5:23
Moon illuminated 6%