There is also a tablet that you can put in the water. I forget what it's called. But it turns the water a bluish tint and it provides more oxygen in the bags. When I buy fish from my favorite lfs
which is about 3 hours away, they always put 1 tab in each bag. I've never lost a fish yet to it. It may not be needed, but I can tell the difference in the air in the bag if one is used or if its not.
When transporting the filter make sure you put the filter pads in a ziplock bag filled with old tank water. That way the media stays wet.