I need personal experience and tips for storing milk?

My daughter is drinking 8 3 oz bottles a day of milk..... I have 50 bottles stored in the refridgerator. Now, I know that milk is good for 8 days in the refridgerator so now I need to start freezing the milk. I need suggestions on a system of freezing and thawing.... I know that milk that has been frozen is good for 24 houra after thawed in refrigerator. Is that 24 hours from the time you put it in the refrigerator? How do I do this? Once I run out of refrigerated bottles do I just take 24 hours worth of bottle and put them in the refrigerator at a time? What if I need to go somewhere and need to take bottles with me.... how does that work? How do I heat up the bottles at home and on the go..... please help. Oh.... I am currently using the gerber seal n go storage bags.