I wash and reuse freezer bags, except the ones that had chicken in them. I know some people turn the bags inside out to dry. I don't do this because I always seem to tear the ends of the "zippers". What I do is take a section of a "select-a-size" paper towel, fold it in half and put it in the bag, then press the bag flat. You can zip the bag shut if you want to, but this is not necessary.
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Turn those plastic bags wrong side out when you wash them. It is much easier to get them clean, especially in the corners.
I wash out ziplock bags (freezer and storage) after use. I throw away any that had meat in them that thawed.
This is a page about using zip top bags. These baggies can be useful for storing all kinds of foods and things. The ziplock can help keep lunch, refrigerated or frozen foods fresh.