If there are just two of you traveling, you will be sharing an average-sized 4-door car with the driver and guide. This means that there will only be so much space for everyone’s luggage. We suggest that you keep it down to 1 good sized bag or suitcase for each of you plus one knapsack or carry-on bag for each of you.
Be prepared to dress for warm weather. If you forget anything or neglect to bring something you will be able to buy it inexpensively in Iran. Just about anything you can buy at home can be bought in Iran. Many European products, for example, eyeglasses, can be relatively inexpensive in Iran.