Your question is not as clear as it could be. There is only a bus from the parking lot to the beach, but if you are asking if the Laguna Trolley goes to Crystal Cove, it does not. The bus service does go along PCH, and they are pretty clean, as well as Uber being an option.

There is street parking above the top of the stairs - it fills up very quickly on a beach day. Plan carefully if you’re bringing kids to the Tidal pools- there is no easy access to where the total pools are.

The tide pools here are not as plentiful as the ones in the many coves South at LAGUNA Beach.

We did not check out the primitive campsites as they are a 3-4 mile hike from where you would park your car.

I always keep my eyes open for non-campers who shouldn't be walking along the campsites that we stay in, and we never saw anyone walking that didn't look like a fellow camper. Everyone said hello and or looked at you face to face and nodded hello. I also never noticed anyone hanging out in the lower picnic areas that looked unusual or sketchy. Having the ranger station check-in booth just above the electric sites also makes it a little more secure during the day. I never noticed anything unusual at night, except a coyote yipping loudly through the campground. Keep you pets inside and your trash up.

Not sure if you got the answer you're looking for, but the hike-in to the campsite, from the beach area is about five to ten minutes. The campsites are up on the bluffs looking over the beach and pacific coast highway, so there is a steep walk up the paved road to the top. One of those walks that gets your heart pumping

Please confirm with a state park ranger, but there are picnic spaces on the cliff areas over the beach. I believe they do allow for a small propane grill but please confirm with the park staff.

I guess it would take about 10, maybe 15 minutes, depending on how excited the kids are. The paths we saw are all easy going and hard surfaced, so OK for buggies and pushchairs. The beach is beautiful, mostly soft sand for what seemed like miles, with few other people. You might want to discourage kids from scrambling up the cliffs, which look easy but the sandy rock tends to be quite loose underfoot. Knees may get scrapped... Probably better to play in the sea and surf, which was gentle and great fun while we were there. Have a great day - we did and look forward to going back there.

Parking is plentiful, I found, but expensive (the day pass).