The Griswold family's vacation misadventures feature in both "Hotel Hell Vacation" and the "National Lampoon Vacation" series, as sanctioned by what company?
Hotel Hell Vacation:  Although sanctioned by Warner Bros. (which holds the underlying rights to the "Vacation" series characters and concepts), this film was not sponsored by National Lampoon, Inc., which initiated the "Vacation" series. National Lampoon's Vacation (film series):  The series portrays the misadventures of the Griswold family, whose attempts to enjoy vacations and holidays are plagued with continual disasters and strangely embarrassing predicaments.
Warner Bros.