In TWD's season 8 finale, Dwight leaves after reading a note from his wife that says "Honeymoon" on it. So, apparently they took their honeymoon in Texas. A bit convenient, but not really a stretch.America is a big place, and to have 2 separate people from the Alexandria area meet up in Texas seems like a bit of a stretch. Unless Dwight somehow followed Morgan out there, but I doubt it.