I am going to Hanoi,Sapa,and halong Bay trip from 27th Sep to 09 oct 09.I am also planning to cross the borders of Laos ,Luang prabang exactly.Is any one travelled by bus from Hanoi to Luang prabang.can any one post their experiences.Can we get Cambodian visa at the borders or we have to take it in Singapore.How many hours jurney from Hanoi to Luang prabang by road.Kindly reply.