So my wife and I are going to Tinley Park in a couple weeks and I'm hoping to bring home 2 or 3 new scaled babies. The temperature that day will only be 45 degrees and we have a two and a half hour drive home. Of course we'll have the heat on in the car but will that be enough for them? I was thinking of insulating a cardboard box with styrofoam and newspaper with a hand warmer or 2. Will that be too much? I just don't want them to get too cold on the long ride home. Any advice would be very much appreciated.