Where to park here or is free too?

I know Camelot inn cost $25 to park all day and it's across the street from Disneyland.

It costs. You may want to park in hotel and use a shuttle to come to park.

To park on the Disneyland property costs to park. Some hotels nearby have buses you can take for a very reasonable price. Or if you are near to the park you can walk or get an Uber or Lyft.