Good morning ladies! At the end of June, we are going camping with another family and will be on the lake most of our days. I will be done with BFing at the end of May and will be using my frozen milk there after. DD won't turn 1 till August but I need to know how to keep my milk frozen while I'm on my mini vacation. We leave on a Thursday and come back that Sunday. We have an electric site and will be in tents. I'm not sure if I can talk my husband into taking my parents mini fridge. Does dry ice last very long?