Yes but depending on how many parks you go to in a year, it's often the most economical way to visit more than two or three parts or a park more than two or three times in a year. Which is normally something that I do quite often. Even last year in a very slow travel year for me I visited I think five different parks and some of those parks multiple times. 

I mean you always have the opportunity as well to go early in the morning and stay throughout the day or go late at night and do you think that most normal people don't get to do. One of my favorite things I've ever done was a midnight hike to delicate art and arts is national park. Early October little bit of snow and ice on the ground, beautiful midnight sky with stars all over. Absolutely phenomenal with not a single person anywhere near.