We are flying into Rock Sound in May in our own plane to board a charter sailboat. We really like to have box wine on the boat since the plastic "box" is so much more sailboat-friendly as opposed to glass bottles. Can you buy box wine at the grocery store in Rock Sound? If not, will I be able to bring a box with me? I see the customs list says 1 qt. wine and 1 qt. spirits. With the two of us, the 5 liter box would be over that amount.....we will be actually clearing customs at Rock Sound.