block off a certain period, I suggest mid Dec and beginning Jan for the interviews that you want the most, i.e. what you think your top choices are. Then schedule interviews as they come, leaving the less desirable ones toward the end or the beginning. This way, the beginner ones are for practice, and the end ones you can always cancel with plenty of time left in case you have too many or you run out of steam with interviews. Do beware of weather, i.e schedule northern places in november and avoid dec, jan, feb snowstorms if you can.