This is a basic Forest Service campground, but it's good one with lots of space at the sites and ample room to drive in and out. Access to the South Mt. Elbert Trailhead is a short walk, and it's a short drive to swim in Twin Lakes, drive up Independence Pass, or fish in the Arkansas headwaters. Only 10 minutes to Leadville, as well. 

The pit toilets were clean and there's water spigots throughout the campground so you don't have to walk far for dish water or drinking water. Firewood bundles were available at the campground manager's trailer for $5. 

It's not luxury camping, but it's pretty darn good.

This was our first stay in Estes Park, and we couldn't be happier with the KOA facilities and staff. 

The staff were *extremely* helpful and welcoming. We didn't feel the "Oh, God… another tourist" vibes we got from basically everyone else in Colorado. On the contrary, they couldn't have been happier to see us and welcome us to their little city. They even gave us personal directions and recommendations for what to do in Estes Park. Moreover, we decided to leave a night early, and they completely refunded our last night's stay without hesitation. 

The facilities are excellent. There are combo shower/bathroom stations throughout the campground so you never have to walk far to clean up. These stations also have dish washing sinks, and the the campground provided free dish soap and one of those nice soaping-dispensing sponges. The fire rings are dual purpose, as well--with space for a regular bonfire and then an attached 1' x 2' section with a grill for cooking. 

The only thing I didn't like about the campground was how close it was to one of the main thoroughfares, but that's not uncommon with KOA's, so it didn't bother me that much.