Loom knit infinity scarf

[lydiaharper]

I want to make an infinity scarf on a kk loom.  I have made short cowls on the round looms, but for this I want to make a scarf on the long looms, then attach the ends to make it circular.  Do you think I could knit the basic scarf using one side of the long loom, then bring up the cast on edge to the last row (like making a brim on a hat) and knit off, then just bind off??  Do you think the seam this procedure will leave would be super noticeable? Any other ideas on how to join the ends inconspicuously?