We would like to rent a car for the last 2 days of our stay at the CR. Is there a car rental desk right in the hotel? If not, who has the best rates and I will also need a car seat. Are the car seats that they rent out really gross? I am still not sure about renting a car because of the car seat issue and I don't want to lug my seat on the plane with me. My son is 4 years old and still needs the car seat in the car but not on the plane.