Yes I do believe. When making a reservation for a LA State Park, just pay the deposit online and when you arrive, you can show your senior ID and get the discount. It will be figured into your balance. I don't know that you can apply the discount online up front if you pay for the entire stay.

Yes. Type 62PLUS in code area

Yes. You will be charged when you make reservations but if you show ID at check in the discount will be credited back to you.

I received it when I stayed.