Hi, we are planning to visit Yosemite next May, estimated date of arrival is between 20 - 22 May 2013. Intending to visit Mammoth lake as well. Does anyone know will Tioga Road be open by then? We do not wish to face a situation whereby we booked the lodging but to know that we cant visit Mammoth Lake. Tioga road is the only way to reach Mammoth lake?