I will write a bit more when I have more time but so far it is great and easy.
I arrived in Yazd today and will explore town tomorrow. I did a quick round and already saw that most shops (bazar) are closed. According to the hotel because there are no tourists. So far I have not seen any other tourist from outside Iran. But Yesterday Isfahan was busy and lively (I really enjoyed that city).

I expected police stops everywhere (as in Iraq I had to stop almost every 50km to have my visa checked) but there are non. I've not (yet) been stopped by the police (I knocked on wood).

After Yazd I will go to Bandar Abbas to take the ferry to Dubai. Not sure if I will pass/stop by Persepolis or not.