My package bees, after a 3 week delay relative to when they were supposed to get here, are finally scheduled for arrival sometime later this week (probably on Saturday). I have some last minute questions about package installation and queen release: The weather forecast calls for highs in the 50s/60s but lows in the 30s/40s over the next 10 days. I am going to put the bees into single deeps with a screened bottom board and a hive-top feeder, and brand new frames, with wax foundation. During the day, the bees should be able to get all the syrup they want, and even go flying about if it's not raining, but I am worried that during the night they will have to cluster and won't be able to crawl all the way up into the top feeder and then down to the syrup. Is there anything I can do to help them get through the nights until the temperature warms up a bit more? Should I put some powdered sugar on a wax paper on top of the frames? Should I put in the varroa screen so that the hive is a bit less drafty? Thanks a lot.