"From what I understand you can camp at Peralta Trailhead (for a fee) or you can camp at Carney Springs Trailhead for no fee."
While I didn't see a sign specifically prohibiting camping at Peralta Springs, there are no campsites. There is a rough campsite (at least, a level spot off the road with a fire ring and one small shade tree) between Carney Springs and Peralta, on the N side of the road. The validity of this site is questionable; the property to the immediate N is marked "No Trespassing".
The Carney Springs Road is now closed to vehicular traffic. You can't camp at the springs unless you are willing to backpack.
"If you go all the way to the Peralta Trail there is a parking fee which you can pay with your credit card. "
I didn't see an obvious fee, and certainly didn't see any capacity for paying by credit card...
Thanks for the heads up, changed the info.
Does anyone know why there are 3 of them on this peak?
There is now a sign along the road that say "No camping at any trailhead". There are 3 trailheads, all are free now. Most of the land leading up to them is State Trust Land, according to their website: An ‘Individual Permit’ allows the signatory limited privileges to use State Trust Land for some recreation.
Recreation under this permit is limited to hiking, horseback riding, picnics, bicycling, photography, sightseeing, and bird watching. Camping is restricted to no more than 14 days per year.
Individual permits are $15, family are $20, I think per year. They are available by mail, not sure about in person.