My wife and I are arriving in CM from U.S. about Nov. 26 and are thinking about renting bikes for a road trip. 1. Do we need and intl. drivers' license? 2. Can we buy cheap helmets there or should be bring ours? 3. Where is a reasonable and biker-friendly inexpensive place to stay? 4. Anyone else around there that knows their way around going out for 3 or 4 day ride we could tag along with? 5. We need to get from airport to good place to rent bikes-- any suggestions?