Is there an admission cost to the park?

No. But if you take the tram it costs

Not once you get there. You have to pay for parking and then take the tram (for a fee) or hike up the mtn

I went thru Idlewild and No, no admission fee, but I also entered the park thru the Mt San Jacinto Tram lift in Palm Springs and paid for tram fee of $35 .... but got to hike into State Park

Excellent part

Yes

I don’t think so. Only for day camping.