Meanwhile, more and more travelers hike the Salkantay Trek on their own. The path is quite easy to find, and on the way, you also will meet other hikers who you can ask for advice.
Locals also offer simple rooms, but in high season these are very quickly full.
The disadvantage, of course, is that you have to carry all the camping equipment yourself, and that can be extremely exhausting at altitudes above 4,000 meters.
I only recommend doing the Salkantay Trek alone if you are in very good physical condition.