One of the segments in Episode/Show 109 has a guest designer, Laura Irwin, who is demonstrating that wonderful Boot Bag! She's showing helpful finishing steps and techniques.
The pattern was in her book, but looks like Knitting Daily is offering the single pdf for free!
http://www.knittingdaily.com/media/p/27922.aspx
I've always loved this bag. It's so classy IMO.