Linda, right on!!!! Yes, feed the nuc, they won't have enough foragers to get out to get enough food. Watch out for robber bees. Sometimes nucs are not strong enough to defend their hives really well. Don't worry about the queen cells, the bees will figure it out. By the way, you take nice pictures. I love them!!!!!
When I made the nuc from my wintered colony I put a robber frame infront of it. I still cannot post pictures (eeks!!!!), but this is what I had on hand. My husband had made a wooden frame with mosquito netting in it for one of our basement windows. When I lean it up against the front of the hive it make a perfect robber prevention. The bees inside can get out easily by going out the sides, but the robbers can't get in (unless they figure to go around the sides) because the screen blocks them. So, hopefully it will help to prevent robbing. I also have an entrance reducer on the nuc so they don't have as much of an entrance area to defend.
Hope things all go well for you, great life, great luck. Cindi