We visited Spark last weekend and had a fantastic and relaxing couple days and nights.
We were surprised how straightforward it was to find and reach the campground in a medium-clearance vehicle. Not a bad trek at all.
Clifford, the proprietor, is a living LEGEND, and does an amazing job keeping the place looking great, the wood pile stocked, and the Porta-John clean. (Forgot to sign the guest book. Next time!)
Wide open views, fresh air, dark skies, and plenty of options to set up camp however you'd like.
Recommended to anyone looking to camp comfortably in the high desert, or just snooze a night or two on a route 66 road trip.