Instead of buying bobbins I chose to set up a folding table and just flip the blanket over after each round. This way the yarn is still in the same place. I am working with 22 diff skeins of yarn at once sometimes and so far so good. 😊
We don't carry yarn when making a graphgan because these projects typically require many colors. Carrying the yarn would create bulk and visible strands, leading to an untidy finish.