In most TV broadcasts, the closing squares (before the ending scene) pop up in rhythm to the Native American dancing/drumming. On the DVD, it is either not in rhythm or the squares do not pop up at all.
The final shot of the family admiring the canyon from the overlook was filmed at the same time as a similar scene in Grand Canyon or Bust (1971), as they're first arriving at the Grand Canyon. You can tell because all of their outfits are exactly the same.