Don't know how "light" you are traveling, but if you have not been to the Sand Dunes, it could be worth investigating. If you got lucky on the weather, fleece and a windbreaker would suffice, and you could get in a great hike or two. The nearest motels are in Alamosa, about 45 minutes away. The campground is open, but expect 20° nights.
A great trip report can be found Here.