I am planning on using this service to get to and from the airport. We would like to make the allowed "grocery stop" and I have a couple of questions for anyone that has used their service. Is the store conveniently located along the drive or out of the way? We want to have a disposable cooler in our room and hope to buy it during this stop so we don't have to bring it on the plane. Do they stop at the type of store that would have one in stock? Thanks for your suggestions!