Yes, the YC/BC salon does the cornrows...while I was having my hair wrapped at the booth by Hurricane Hannah's a family with two girls came by...one had the cornrows done...and she had it done at YC/BC...They had done the entire front of her face back about 3" or so, like to wear you would wear a headband, if that makes sense...and I think they said it was $56. I think they called that a 1/2 head...second hand info so I don't know about a whole head...the salon is called Periwig or something similar...I would call the resort directly to ask about pricing if you needed info for your budget.
Have a great trip...just got back from our own 7 day trip at BC...we loved it...