No, Not that I am aware of.

Ciao, in base alla giornata ed al numero di persone\auto presenti, potresti dover parcheggiare un po distante. Certo le cose cambiano se hai un auto col permesso per disabili, in quel caso ci sono parcheggi riservati più vicini.

Yes, parking is available

As I always say - check the web site!! There are full details of the 'shuttle bus' service there - I quote "The easiest option to visit the Griffith Observatory or to hike to a view of the Hollywood Sign will be to use public transit, the DASH Observatory shuttle, which is available 7 days a week Avoid the hassle of traffic congestion and parking fees and use public transit. It is fast and convenient. DASH Observatory is the official transit provider into Griffith Park. it connects at the Sunset/Vermont Metro station and makes stops through Los Feliz village, The Greek Theatre, Mt Hollywood hiking trail and the front lawn of the Griffith Observatory" Any help? The Observatory is a fantastic place to visit - as is the whole park - have a great time.

Yes. Others seem to have given the information!

Yes, I actually came in through the south end on my visit and followed a well defined trail up to the observatory. Its an easy to follow path.

Griffith park is massive so I'd recommend using uber/lyft to get around from wherever you are finished to LA Zoo! There are buses that run down Los Feliz blvd but it depends on where you're finishing up in the park!

Yes and much more.. I saw families having picnics. Just try to have as mush disposal items so you are not weighed down on your hike

Absolutely and be sure to bring water / beverages. It can be difficult to find places to eat or a water fountain.

Short answer: no. Long answer: if you chose to camp, you have to go in the cover of night. There are patrol persons all the time coming through, so you have to hike and scope a spot, then return when you think you can get away with it. There are also wild life who live in GP, so go at own risk.