I will be in Iceland for 4 days in mid July and I am looking to rent a car to go around Iceland. I will probably book the cheapest deal so it will be a compact 2WD car. My trip will mainly be limited to sights on Highway 1 and some other standard detours along Highway 1. I am not planning to go off-road or drive on ice. Will I need to buy "Gravel Protection" and "Sand and Ash Protection"? I am not sure why they are required when I am already buying Liability coverage and Third Party Insurance. Gravel Protection and Ash protection are not offered if I rent a car through US websites such as Expedia or Priceline. Adding those insurances increase the rental cost by about 100 dollars. Are they really needed in summer if I stick to paved roads?