The trip to Iran was the one I had most objections about, but day by day I fell in love with this country. It is very easy to do on your own, the locals are extremely friendly, and although we are all concerned about the political situation, it is like in the U.S., you always know where you shouldn´t go. Well, the Silk Road Hotel was one of the best experiences I had. The food is fabulous, the rooms are very clean, and above all, there is a very good atmosphere making you enjoy every moment. The managers can organise local excursions if you want, in small groups so that taxis can be shared. From here, I recommend going to the desert and also spending a night in a caravanserai.
When backpacking, you don't normally stay in this time of place. However, don't outrule it because there are few places in Iran where you can stay in a caravan and have it be worth it. It is 50 km from Yazd, and you can get here by taxi / car. Is very close to the road, so you do not need a 4x4. Actually no rooms because it preserves the structure of the original building, where through two symmetrical wings spread different rooms that are closed by curtains. It is very safe, so do not worry. The best thing to do here is to go up to the terrace at night where you will greatly enjoy the night sky. The food is pretty good, and the yard is a luxury. Organize parties "native" with music and dancing, but of course, I had plenty a bit because it's a bit turistada. You can take a walk around, but watch out for snakes ;-) It runs a family that has been in Spain and often receive many tourists here. Watch stocks, not present in the door because you can find all full if you called before.