A visit to Manning Camp is well worth the challenging hike up. This backcountry camping area can only be accessed by foot or on horseback, and sits within sitting distance of the historic Manning Cabin, which is currently used administratively by the National Park service. From spring through fall, you may encounter the Manning Camp ranger, or other Park service staff who are friendly and knowledgeable. Otherwise, you are likely to have the place to yourself. Stop by the visitor center for a camping permit before you hike up, though.
While camped at Manning, you will find ample opportunity to hike and explore the beautiful forest with it's long views, wild flowers, and wildlife.
Be sure to walk out to the helispot for sunset over the Tucson basin!