We took the funicular train up to Gurten on a Saturday - the train is included with any Bern transport card you get if you stay overnight in the city.
It’s a wonderful park, but our visit coincided with a large company event which had taken over much of the park. This meant it was overly crowded in a lot of places and it was hard to find food or drink options.
We did love the toboggan ride - both parents and children rode it several times - which you can buy tickets for at the ride itself. The queue was not too long despite the large crowds and the fun made the trip.