I plan to feed. (please read)?

Ok I am going on a 12 week maternity leave (currently 37 weeks pregnant) and my job needs me to go to a training cl in Minneapolis (Id have to fly and stay a day or two, possibly more.) This cl is needed every year and happens to fall on the time of my leave, but I have agreed to go. Its about 7 weeks after my daughters due date. I plan on feeding, what can I do in the days I am gone to feed my daughter? Should I freeze my milk and have my fiance give it to her when I am gone. What is the proper way to thaw out frozen milk? Sit on the counter, put the bottle in a pan of water and boil?