I'm a natural casing snob.
Up here in Mass, we have a number of decent choices for dogs. Kayem, Schonlands, Essem, Jordans, Dietz and Watson, Boars Head etc. Kayem now makes Schonlands, Essem, Jordans and their own brands. I've also been buying Hummel Bros. from New Haven, CT.
Last night, I made some Boars Head pork and beef hot dogs with my baked beans. A friend left them here from a gathering that were not used that time, they did not have a natural casing. Although they tasted very good, they weren't the same as the NC snap. I think I'll have some Hummels tonight to finish up the rolls.