I believe you are worrying about stravation for no reason. The fish eat little if hardly any this itme of year. Natural food can form in that timeframe.
I would be worried more about longterm success in stocking the bass in at the sametime as forage, what size bass and how many, what size bluegill? When you get a few warm days the bass will start feeding on smaller bluegill if they are 6" or greater. I will be out of town but others can respond to you answer, good luck.
