It would have been a more enjoyable episode had it focused more on Lisa and the Wiccans, and not hillbillies. And the whole Bop it joke? That's about 6 years too late. Other than that, a good episode.
Shouldn't they have shown that one the previous week, and then the Simpsons' Twelve Days of Christmas one for this episode? This would have made more sense considering this one was set during the winter.