diaper bag

My new diaper backpack.

I was thinking and it was a thought why not at one point wear some diapers in town. The only problem is it is my first time. Someone suggested that I use two nappy bags to doubble it up them throw it away in a public bin... It maybe OK in the USA but I do not know weather there is a biohazerd...

I've started moving over to cloth diapers from disposable and am looking for easy changing. Has anyone ever used a wet bag for cloth diapers? If so, how well do they work for you and are there any tricks like sprinkling baking soda in the bag with the wet diapers?