The very best of luck to you! I (unfortunately in some ways!) am back in employment otherwise I would have loved to have joined you. 60 days should be plenty, so don't feel stressed when you inevitably take a wrong turn or something else happens.
Aside from the heat and water issue you have already encountered, just remember that the weather can change very quickly. Sometimes the temp can drop by 15-20 degC in as many minutes. Whenever you feel the climate change, make a mental note to stop and assess what is happening. All the more important when you are camping as I seem to remember you are.
If there is any data coverage out there, or at times when you can get wifi - I have a weather app called WeatherPro. It cost a tiny fee for a year but it has current weather maps a couple of hours either side of where you are in 15 min intervals so you can see what is coming your way (or not). Also, it has a 2 day weather map, so you can see likely local weather a little further out. You can also see any local alerts in terms of extreme weather. In Norway I found it to be pretty accurate in the mountains, although I obviously do not know whether you use smartphones etc:D
Buen Camino - what an adventure!
Christer