See Dean's report below. One adjustment - we camped on the west side of the peak along the road at between 8400 and 8600 feet. Very enjoyable hike with nice views.
Bob Bolton and I decided to go after Hyndman and Diamond Peaks in Idaho but thunderstorm activity kept us off of those two 12K peaks. So we dodged thunderstorms and found a couple of decent peaks to bag anyway, one of which was this nice one, Cache Peak.
We camped at the 8600 foot level and made an early start in order to get up and down before the daily activity started. A nice hike really, not much of any kind of a climb with a spot or two of scrambling. We did encounter snow on the upper portions but it was a blessing as it made hiking easier, not harder.
We had great views in all directions but we didn't linger very long on the summit as thundercells began forming right and left of us. The summit of Independence Peak was tempting but we left that for another day. The City of Rocks area was fascinating, I could spend several days just exploring that area,