We are leaving for our vaction on Thursday and currently have a premium car reserved through Alamo as it is the cheapest rate that we could find. I have been looking at the trunk capacity for the premium cars mentioned in this forum and am concerned that we will not be able to fit everything in. Our neighbor has an Impala and we can fit everything in their trunk. Since an Impala is generally a fullsize car through Alamo, my question is whether or not I can take a car from the fullsize aisle if necessary without any complications at the gate? Will I be charged a different rate? Will I have to check with the gate attendant before taking a car from the fullsize aisle. Thanks!!