Well, we did end up hiking up Dog Canyon, but only a four-mile round trip outing. It was quite beautiful - and almost completely solitary, as we only saw two groups of people the whole time. And, crikey, was it windy!
Here's a quick share of some of the views on our hike, including down onto our campground and out into the Permean Basin and White Sands National Park. No bandwidth for photo editing, so it is what it is.