No, you cannot free camp in Banff National Park. Camping is only allowed in designated campgrounds within the park, and all campgrounds require a fee. Banff National Park has a variety of campgrounds, including tent and RV sites, as well as backcountry camping options. Reservations and fees are required for all these campgrounds to ensure the protection of the park's natural resources and maintain the overall camping experience for visitors. For more information on camping in Banff, visit the official Parks Canada website.