It's not too far away from us (20 mins on the train), and with an already paid for tram pass and a railcard means it's cheaper for us to go there for a day out then get a day rider bus ticket to the other side of Sheffield (ridiculous eh!)
If you are getting the train it takes less then half an hour to walk through the town to the park and is really easy to find (tho somehow we went a completely different way to last time). Failing that you can get a bus there, the interchange is a short walk from the station.