usually, if I need the stroller, I'll take the train, easier to bring stroller to destination. If I only can take bus, I'll just use a carrier and carry the stroller up the bus folded.
And whichever, bus or train, I never expect to get a seat, so I don't feel "angry" if others dun give up seat. Set the right expectation lor.
It's both "harder" and "easier" now that they're older.