Can anyone please let me know what is the best time to visit Keukenhof and the Tulip fields? I am planning to be there on Queen's Day, 30th April. Is it going to be too crowded? Or should I postpone my visit by a week or so? Till when are the flowers supposed to be in bloom??? And till when can I see the tulip fields??? Any ideas when does the harvesting of the tulips start in the fields???