What I find interesting is that this seems to be the only recorded instance of the glitch. You are the only google result I could find.
It would be interesting if anyone could replicate the glitch. Perhaps by checking the camper in the town, finding someone offering the camper, convincing the villager to move from another town, and then convincing them to move from the campsite.
I also wonder if it would be the same if the camper was asked first.
Perhaps the game is having difficulty in deciding whether the Wolfgang is from another person's town or from the campsite and thus somehow the data got corrupted during the generation process.
If it isn't figured out by the time I've gotten all the villagers I want, then I may make an attempt to do this.
On the other hand, I'm curious about what other kinds of limitations this will place on your game (Other than the current glitching that is).