The most important thing to remember about termites is that they like moist wood. So keeping your firewood off the ground by at least a foot, covered, and not leaning against your house will ensure that they do not infest your firewood.
If you DO get termites, then you can actually take matters into your own hand and treat the termites yourself, using the same method as the professionals. It’ll take a little work, but will save you up to a $1-$2k, depending on where you live. The link below is the directions and video for this method. Good luck!