Pedantism: Smokey the Bear is employed by the US Forest Service, not the National Park Service.
Pedantism 2: Preventing forest fires was a huge mistake and has helped set the stage for the current epidemic of gigantic wildfires.
Controlled back burning needs to be done. Just letting them run rampant is not a good idea though.
Pedantic lvl3:
Uncontrolled campfires would still be a problem in a well managed forest. Forest fires in healthy forests are still dangerous for hikers or unknowing inhabitants.
Pedantic lv4 a few hikers dying is less bad than preventing even uncontrolled forest fires since forest fires are part of the natural cycle of most forests and are entirely necessary, and the forests have adapted specifically to unpredictable forest fires.