I know the one thing that a lot of knitters have when making the Woobie is hem. Yeah, it's a lot of stitches in the beginning...and Yeah, the hem takes up practically a whole skein of yarn, but the idea is that it gives the blanket weight.
The other big issue with the hem is unraveling the provisional cast-on. Your connecting the 300 live stitches with the 300 cast-on stitches. I decided that perhaps a video might help. The video is a little long, but you get two techniques on how to handle this portion of the pattern. You get the safe technique which involves placing the provisional cast-on onto a separate needle and then you get the "Living on the Wild Side" version.