I'm a second-year beekeeper in Dallas, Texas. I'm making several top bar hives -- one for here, one for my daughter in Rio Rancho, NM, and one for a nephew in St. Paul, MN. We're driving to MN in July and will take a TBH up and assemble it there. What is latest date my nephew can populate a hive there? Any chance he can start this year with odds of bees surviving the winter? I know they have cold weather into late May sometimes.