I'm in the black tank camp for the same reason as others, we can "go" 10 days or so without dumping. Or is it we can dump 10 days without going...to the dump station. We love to winter camp also but find most outhouses locked up for the off season, a cassette would need to go elsewhere. That means a long drive to a town or gas station. Also, with heated basement I've never had the black tank freeze but understand not all campers have the same features. I'd like to try a cassette for sure but not outright buy a camper with one before knowing for sure. It would be a cr_p shoot...