Hi, Camper! Glad you've joined us. I think you'll have fun here.
I freeze broth all the time. If space is a concern then, by all means, do store it in flat bags. I usually store mine in glass canning jars (in 2-cup quantities), making sure to leave head space, and store in my freezer. I also do a couple of trays of "ice cube" stock for times when I only need a small portion. All I have to do us pop a cube or two depending on how much I need. It's a great system. There's nothing like homemade stock in a recipe calling for stock.
Also, I freeze apple cider the way I freeze stock because I have several recipes that use cider in them. Since cider is available only in the fall here, I'm stuck other times of the year when I need it.
Just my two-cents.
"As a girl I had zero interest in the stove." - Julia Child
This is real inspiration. Look what Julia became!