I've read a bunch of posts about people having cars rented through National's Emerald Aisle and then when they show up there are no cars in the aisle. We are arriving on a Sat. afternoon (Dec. 17) and am wondering what the procedure is if there are no cars in EA. Do you have to go inside and get it sorted out or do you talk to the person in the checkout booth? We are traveling for the first time with our little kids and I want everything to go as smoothly as possible. Also, I read another post about not receiving a receipt. Do you pay up front? If so how could they not give you a credit card receipt? Or was the person talking about an itemized receipt? It seems strange that with all the planning that has gone into this trip that it's just getting into a rental car and away from the airport that is causing me the most anxiety.