I have a dilemma. I'm picking up bees on Saturday morning and then I have to leave town for the weekend. Should I install them during the day on Saturday before I leave instead of the evening which is recommended? Or can they survive in the package until I return Monday evening and install them then (of course they would be cared for by keeping in a cool place and watched over). I guess my question is how long can bees be safely kept in the package before installation, is 3 or 4 days too long?