Low humidity is where bearded dragons thrive, so that would not have been an issue in AZ at least. As she moved north and east on her way to CT, it might have become more of a concern, though is less of an issue in the northeast in the fall/winter. The temperature differential and UV light that bearded dragons need would have been more concerning. They need a basking spot that is in the 100-110 range in order to digest food and the cool end of their temperature range should not fall below 70. They need proper UV lighting in order to get enough vitamin D to process calcium, which is critical to their health.