You can dry camp but not with a trailer. You can camp outside of the park with your trailer.
Yes. At the entrance to the gate your get a free pass for camping on the grounds and they'll explain everything.
Yes, but you need to be a minimum distance from any roads. Check with the park website for specifics.
You can ask for a map at either entrance. It'll give you a color coded breakdown of where you can and cannot go.
Close by there's camp sites
Only in designated areas
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