What is the film. Older sister ruins chances of her younger sister to appear on national TV. Gets to spend most of her time camping and dressing up?

The film you’re describing is likely "The Other Sister." In this movie, the older sister's actions inadvertently undermine her younger sister's aspirations, particularly when it comes to appearing on national television. The plot also features themes of family dynamics and personal growth, with the younger sister finding her own identity while navigating challenges. The camping and dressing up elements highlight their journey and the contrasts between their personalities and ambitions.