We used Tilly Jane as our base for hiking Cooper Spur (trail 600A to 600B) and it worked perfectly! The road getting here is not so great (you're driving up a mountain) but passable if you go slow. It's quite far up the mountain, so make sure you have everything you need. There isn't anything fancy about the campground, but it makes an adequate base for an early morning start.

Tilly Jane is also not far off the Timberline trail loop around the mountain, and the majority of people visiting the camping area were day hikers. The weather was very hot in the day, but got quite chilly at night.

In addition to the campground, the Tilly Jane A Frame is available as a rental- it was having some work done to it in August 18, so should be in good shape for the summer 19 and beyond camping seasons. There is also a small amphitheater in the campground.