No. I saw little kids in the creek up to their knees. They used to have the creek dammed back in the old days , but its been removed for fish migration.

Not at the moment. Nearby Portola Redwoods SP has a pretty decent swimming hole although it might be a little low this time of year

It looks pretty shallow to me, but it’s the only time I’ve ever been there so I don’t have a frame of reference.