Visiting Portorož with family – what should we see?

Hi! We’re going to Portorož with my wife and our child.

What do you think about the beach and the surrounding area?

We’re also planning to visit Piran and see the marina. What else would you recommend?

We’re traveling by car, so we can go anywhere nearby.

Also, I’d like to use my stand-up paddle — is that allowed there?