Can you bring outside food?
Doesn't hurt to try
It's tough to get in there, but don't let that prevent you from trying. The park does fill up very quickly so go early.
In high season it will be difficult
I'd say almost no chance.
It is first come first serve for day visit to spring. Camping is registration or you can cross your fingers and arrive a see.
Holiday weekend? Very slim. No harm in trying to call first thing in the morning though.
If is on the weekend you have a small chance..
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