Is there still room to rent the same day? I have heard that there are many sellers

Hello Rubi, if there is a place for the same day, you just have to arrive before 6:30 am to sign up on Saturday, there is a small possibility that you will not get a place, arriving early is the recommendation

And

If you live in victorville or nearby, I suggest you go personally where they charge the entrance and ask, sometimes it is better to ask the people who work there, it is more recommended, I hope my comment will serve you