Belgium

It has been quite a few years since I have been to Belgium and the Netherlands, but am entertaining the idea of a trip back in late January. Are the lambic breweries still open to the public that time of year? I have been to Cantillon and 3 Fonteinen, but none of the others. Boon looks to be relatively easy to get to from the Halle train station, Oud Beersel the same by bus from Lot. Is this true? Are any of the other breweries accessible by train or bus? I have the Lambicland book, but imagine a lot of the information is outdated. I sort of want to go to Mechelen as well, stop by Gouden Carolus. I have been to lots of Belgian cities…Brussels, Antwerp, Ghent, Brugge, Ostend, Kortrijk, Mons, Tournai, Namur, Tongeren, Charleroi…but have barely been to any proper breweries…seems hard to do without a car. Any beer centric destinations I should think about?