it may be usful to know that the huts at laban rata are often booked 6 months in advance. it was not a problem for me, because i preferred to hike it in a day (with special permission from the park superintendent).
also, i had no problems finding a taxi to the park. after reserving a dorm room at park HQ for the next day at sutera lodge, i walked across the street and caught a taxi to the park. (may 2006)