The hard bit is getting a day with nice weather when it is lovely, but if it is cloudy/raining it is pretty grim. If you can find a weather window then set off early and enjoy. I would choose one of the easterly approaches rather than walk up the main track from the station carpark, but you need to plan where to leave the car etc. Note: The train may be full and not allow you to board for the trip down btw. So don't depend on it.