The wrinkling issue has to do with 100% cotton content, not twill vs. canvas (which is the weave pattern of cloth). I've made kilts from both styles of JoAnn's bottom-weight poly/cotton and it works well, not the heaviest cloth but fine for summer wear or year-round warm climates such as we enjoy here in San Diego. Probably not the thing for an Ohio winter, though 
For $4/yard, it's hard to beat. Stock up and have fun with it! Keep us posted and ask away, lots of us have used that manual and can help if something seems not to make sense.
Also welcome to XMarks!
Proudly Duncan [maternal], MacDonald and MacDaniel [paternal].
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