Until I bought my Orvis Sonic waders I used this trick every time I put on my waders. It makes taking off the waders slick, slick slick. I used regular shopping bags for this.
Now that I have the Orvis Sonic waders for some reason I no longer need the plastic bag as these waders slide right off and the fit of the bootie is the best I have experienced so far. Does it sound as if I like my waders....Yes, I do. And they were cheap compared to others.
Take care