Steamtown National Historic Site is across the parking lot from the Trolley Museum and it is free. You can spend as much or as little time as you like.

Lots of parking available

Yes it is suitable for a stroller.

Yes BUT it is worth seeing the actual locomotives, the shop, the short movies. It is interesting and entertaining. Then head over to the Lacawanna Radison and see the grand rail station that was turned into a hotel.

It depends on wether or not you take the train ride and stop at the trolley museum and take that ride as well. There is a movie which is a great introduction to the museum. I would say without visiting the trolley museum across the parking lot at least four hours. I recommend the trolley ride though. That would add another hour or two.

wanted to post an update since the other answers are for last season. in park cause hops and short lines are 5$ , longer excursions very in price. no longer excursions have been posted for the season as of yet due to contract issues with other railroads that own part of the rails. entrance is 7$ and free for children 15 and under with with a paid adult. call ahead that day if you want a special annual/ or life time pass as some seem to be going very fast. hope this helps.

two hours should be plenty

I think they have a variety of rides. Some are all day. There is a short one less then a half hour. I am not sure of rates, but go on line to the website, they will provide much more detail re: fees. Have a great time if you do go.