I ran a search and couldn't find the answer to my question...

I was wondering what the pro's and cons of having carbs before bed. I know fat is suggested because it slows digestion, but what if you had a low gi carb like sweet pot or oats? I was always under the impression that carbs were bad before bed, but never read an explanation for it. I'm also bulking, so I don't mind mixing macros so long as the carbs and fats are from good sources (EFA's, yams, ect). Input???