That looks similar to a couple of slipper patterns I've done. But you mean you think there's too many stitches and it will be too long? When you do a cast on like JMCO or turkish or figure 8 where you end up with sts on both sides of the cast on line, you need to CO so there's half the number on each needle.
What yarn and what size needles are you using?
sue- knitting heretic