I use a snowshoe bag for storage and transport as well. I mainly got one to try to contain the snow and water from puddling inside someone's truck/hatch area as well as protect other gear during transport. Same reason I have a boot and ski bag.
I have the MSR bag, it is fine, but honestly you will be fine with a garbage bag unless you are planning to fly with your snowshoes. I only got the bag after an Air Canada agent took issue with my heavy duty garbage bag-wrapped snowshoes.