Breast milk?

Me

Okay so I have a question I’m on a little vacation in Florida right now and currently breast feeding my 3 month old I had brought my breast pump along with and have been pumping in the middle of the night as she is sleeping through the night and I’ve been freezing it so my question is will the breast milk be okay to put in a cooler with a ice pack for when going to the airport back home and put it in the freezer once I land? I have over 20 ounces I don’t want it to go to waste! I’d like to store them in the freezer once I get back home. Would it be okay to do since it’d be in a cooler and then refreeze?