Murica

Ride Bike 5-10k to train station, take train for an hour or two with bike, ride Bike 5-10k to my parents house. I do it once or twice a month.

Take your bike on the train. That's what I did last time I had somewhere to be that was >100 km away, and it was a fantastic trip

In nice weather? Pretty good, as long as you are staying the night..... And don't mind being tired..... And don't need to bring much with you.... And can wash your clothes there before you cycle back.