As we have been traveling throughout Colorado, we have had the pleasure of staying in several state parks, and found them all to be wonderful. The only negative is their pricing policy -- in addition to the campsite fee, each vehicle must either have a yearly pass or pay a daily fee of $6-7, depending on the park and season. The daily fee is assessed, in our case, on both the motorhome and the toad (the car in tow). It applies for non-motorized RVs, too -- so a pickup pulling a trailer or fifth wheel would also get charged twice. They don't state this policy very clearly on their literature or website, so a lot of RVers get upset when the check in only to find their daily fee is $14 more than they expected.
We stayed last night in the San Luis State Park in southern Colorado, and the picture above shows the view from the RV window. The mountains are the Sangre de Cristo Range, meaning "Blood of Christ," a name given to them because they sometimes turn reddish at sunrise or sunset. We can also see two of Colorado's "fourteeners" from here (mountain peaks that exceed 14,000 feet), and the Great Sand Dunes on Pinyon Flats at the foot of the mountains across the lake (visible in this photo).
If you look at brochures for RVs, you will often see beautiful vistas out each window -- canyons, rivers, or forests are popular. In reality, the usual view one has is the RV next door! This park gives you the real thing, however -- a beautiful view along with quiet, spacious sites.