Is Storybrook County safe?

Yes it is fine BUT I'll say I personally had a ton of issues with it. Within a few sim weeks I got so many errors popping up and my game froze every few seconds. It was the first winter so probably more like a week into the game.

I downloaded legacy island III which is pretty similar and doesn't give me problems.

Stoeybrook is sooo beautiful but it didn't work for me so I gave up on it. Try it and see