Planning to visit these national parks? You may need to make a reservation to get in

(NEXSTAR) — The busiest months for America’s national parks are fast approaching, and while some may be disrupted by staffing shortages this summer, officials are still hoping to see you at the parks. 

Before you visit some, however, you may need to make a reservation. 

While more than 300 national parks are free to visit at any time, others utilize timed entry and reservation methods to combat crowds, preserve the natural beauty and guarantee you get a parking spot (sometimes in addition to an entrance fee).