Especially since you're in Texas, I'd say no - don't worry too much about that. Unless you're on a multi-day trip where temperatures will cause your breath to condense somewhere in the down, and collect over time, it's not a big concern.

If you're planning on camping in the Arctic, or have plans for week-long snow camping in the mountains or in tropical storms, let us know - we can provide additional suggestions for minimizing condensation - but otherwise you won't have any big worries. Just do your best to dry the bag out each morning (put it out in the sun), and you'll be fine.