I give this campground a 3-star due to the "burned-out" tree line (& lack) of majestic Idaho scenery. We stayed in campsite #4, decent mid-day and afternoon shade. Would not recommend Site #5 (no shade what-so-ever) or Site 3 is OK (no afternoon shade). Site #2 is the nicest (for shade and trees) and Sites 1 & 6 are decent pull-through. We did 65 miles of trails from this campground (351 to 551 to 594 to the town of Lowman, and 380 up to Pilot Peak - incredible view of much of this region, perhaps 100mi in every direction). Met folks who did the trail ride up from Idaho City. That would be a nice ride, trees are not burned-out on that side of the summit. Everything burned-out pretty much north of Mores Creek Summit. The "Equestrian" part of this campground is that they have rectangular log bins to put a bale or two of hay in and tie your horse up to.
For the parking area just southwest of campground:
Lots of room to park and plenty of space to accommodate those pulling trailers with snowmobiles, etc. Can start to fill up on weekends during peak hours, but less of a concern if you don't have a trailer.
Important: You must pay for parking online, in advance, print out the permit, and leave it on vehicle dash. Lot is patrolled and tickets are ~$65. If you forget, pullouts along the highway are free to park.
Excellent snowshoeing trail network an hour drive from SE Boise. The Whoop um up loop trail was well marked. The parking lot was clean with space for several cars.
Epic trailhead access to Pilot Peak. Lots of snowshoe/snowmobile enthusiasts to watch out for around the immediate area.