Castaic Lake Access?

[Ishikowa]

I'm thinking of doing some shore fishing in Castaic this weekend and I'm checking the maps to see where I can go. When I was young I used to hike in from the back of the lake off of Castaic Reservoir Road but that's a long hike. I notice a road closer to the eastern boat launch called Ball Point Road, and on the map I see what looks like a parking lot. Does anyone know if that is accessible? or is it blocked off? Also any other suggestions would be greatly appreciated.

I was also taking a look at Silverwood and some of the roads around it. I notice there is parking on the road on the West bank of the lake and on the Eastern side of the dam. Do I need any permits or passes to be able to park there?