The dhutangas are still practiced in the Thai forest tradition, though not to the extent of the middle of the last century but I think there are opportunities to live rough and get out of your comfort zone if you want it or need it. In the thai forest monasteries I've stayed in there always seemed to be monks practicing one or two dhutangas, or leaving or returning from tudong or retreat in remote places.
The first step is to ordain, once you've trained with your teacher for 5 years then you are free to go and live where you want, there won't be so many opportunites to sleep on paths frequented by tigers but caves frequented by snakes and suchlike is a possibility.
“Peace is within oneself to be found in the same place as agitation and suffering. It is not found in a forest or on a hilltop, nor is it given by a teacher. Where you experience suffering, you can also find freedom from suffering. Trying to run away from suffering is actually to run toward it.” ― Ajahn Chah