for me is a definite highlight of every visit there. Different than temple hopping, lots of w exercise and very quiet compared to temples . It looks that a lot of people are not aware about the option. I learned about that from Lonely Planet guide.
One can do it also on bicycle as 90% of walls are well preserved. In fact I met there 2 groups of European cyclists last time as well as German couple doin the same in reverse direction.
I never saw any snakes there but at least twice I was warned by locals " watch for snakes " so they may be there. Good news is , track is wide and sandy , just like shown on the first picture above so any creature will be noticed from far and wide. Another good news is that it can be broken at any of 5 gates if one feels tired , thirsty or bored . at southern and western gates there are stands where you can buy something to drink, they even had Hanuman Black beer, my favorite in Cambodia.
Let arrange next trip at the same time and we can walk together.