What time is good to wait for the park and be the first? If I'm there at 8am is it okay? I want to go on a Saturday that opens at 9am.

If it's true, they have a lot of space and parking is very close ... I arrived at 10am and I had no problem

If you want to be one of the first, it's fine to arrive around 8 or 8:30, but in the end there is space and parking for everyone, so it doesn't matter much to be the first!🙌