Thank you @hallasm. Something like that is probably what we'll do. Walk around town, see the sites, maybe the petro museum, eventually sit and have a coffee or wine or small bite to eat.
We'll also look into doing some hiking. I'd love to hike Preikestolen/Pulpit Rock, not sure if my wife can do it, but we'll see what else is available in the area.
We'll enjoy ourselves no doubt.