I would do the transfer in the evening. Smoke the bees, carefully open the birdhouse (bring tools like a small prybar, screwdriver, hivetool, hammer...) bring frame of broodcomb in your hivebody, tranfer bees to your hive body. Remove all comb from birdhouse, clean it good, put it back together for your friend. At near dark, smoke the bees into the hivebody, close it up, seal the entrance, leave the birdhouse there, and take the bees home. Open in morning or that night if you want to and don't forget to feed them.