Depending on the style of the poncho, about 12'. Once you know what the poncho will look like, design and trace a pattern and then buy the right amount of fabric.
If you want them to be perfect half-circles, use 20 feet as the diameter of your circle, find the circumference, then divide by two. That will be the perfect length...
For the first question, a camel's breath is the main thing that smells, however this can be altered by attending to their diet, and even brushing their teeth. They aren't...
That depends on how wide you need your bias tape. Here is a basic calculation and you can adjust for your needs. Most yardage is around 40" wide of usable...
You can either cut into the fabric itself, parallel 3 to 4 inches all the way around, or you can add a pre-made fringe by stitching onto the hemmed bottom...
