Hmm not sure if they have reopened but went on that tour a few years ago and loved it! It is a great tour to combine with the Nine Mile tour to Bab Marley's childhood home which is even better and Fern Gully too which is also along the way. That was one of the best tour days we've had in Jamaica!
We did the Walkerswood tour in 2009. At that time, production at the plant was shut down, but they still gave the tour. The setting is breathtakingly beautiful. The concierge will be able to answer your question once you get there. We also loved the drive to Walkerswood through Fern Gully.