Trying to decide between public transport or coach tour from London to Windsor Castle. Will be between Dec. 27 - Jan 3 so probably pretty chilly weather. 2 Adults and 2 older children (18 and 21). If we take a train(?) to Windsor how far is it to the castle? Walking distance in the winter? Staying at Hilton on Park Lane if that makes any difference. Leaning away from one of the tours that has three stops like Castle, Stonehenge and Bath, seems like a lot of time of the bus and not enough at any one stop.
Any tips or advice appreciated. Thanks.