You could have crashed with Asher if you made it four. But Kos sounds nice, too. One of these days, I'll make it to the Mediterranean. It says Kos is a Greek island, but it's really close to Turkey, if I've got the right place on Google Maps.
Road trip from New York to Miami. That would be a good one. Sounds like you're going for roominess with the Yukon. I guess 20-ish mpg on the freeway isn't bad for that size of a vehicle. I have an Altima that gets up into the 35 mpg range, so I'm kind of partial to fuel economy right now. :)
My wife is going to visit her sisters and aunts for a couple weeks down near Mexico City, and then we may be heading over to Eastern Idaho in early December. That's about it for us this year.