They're getting acclimated. Are their butts in the air fanning? Did you put a frame of open brood in there? If so smoke them off the sides to force them into the hive box and put the cover on there. Come back after dark, cork the intake and carry them to whatever location you want them at. VoilĂ , you've got a new hive. Without the brood to anchor them there's always the chance the could reissue and disappear for good.