Dude, Sully would love to have a playmate for a week while you're on vacation! Seriously, I would adore having another yorkie around for a few days and it wouldn't be any trouble at all. I'll PM you re: this because if you'd rather do boarding, I know I'm a stranger and all but we can talk.
A good site about this area is
www.lowcountrydog.com 
I live off of Hwy 17 in Mt. Pleasant near the Isle of Palms connector.