I do plan on putting a tarp over top of it at night when it gets colder. I already have plastic over half of it to keep it warmer and drier on the one side for when it rains to keep them from getting soaked.
I live in south Ga and I have a suspended heat lamp in my quail pen for when it gets colder at night and I plan on adding more places for them to hide in away from the wind and I also have a couple hollow logs in there already.