Many posts have mentioned bus journeys from Phnom Penh to Siem Reap by bus but very few or none? talked about the other way (Siem Reap to PP by bus). I know the bus companies do have buses going SR-PP. I sense that it is better to travel from PP-SR? I was told that the road from SR-PP does not have expressways and drive through villages and countryside roads instead. Also, I plan to travel in December and was told it is a rainy season and roads may flood. Can anyone advise on this please? Thanks.