I just split a hive that had queen cells. I made three new hives each with one queen cell with brood, another frame of brood, one of partial pollen and one of honey. I put in enough bees to cover about three frames. It's supposed to get unseasonably cold: down to mid 30's tonight and 32 tommorrow night. I put on a entrance reducer and a sheet of plywood under the screened bottom board. Am I going to have chilled brood and can I do anything else about it?
If there are enough bees to thickly cover all the brood you should be fine.