Primary trip plan (2 days): Icehouse Can Trailhead to Comanche Camp and side trip to Cucamonga Pk on return
Day 1: Icehouse Can Trl to Comanche 5.1 mi (7.0 via Chapman)
Day 2: Comanche to Icehouse Saddle 1.6 mi, Icehouse Saddle to Cucamonga 2.2 mi, Cucamonga Pk to trailhead via canyon trail 5.7.
Therefore day 1 is 5.1 mi (or 7.0 via Chapman), and day 2 is 9.5 mi with a rather hard 1 mi climb to Cucamonga Pk but some gear could be cached.
Additional 2.1 miles if adding Etiwanda for a total of 11.6 on day 2.
Alternate trip plan (3 days): Icehouse Can Trailhead to Comanche Camp with side trip to Cucamonga and Etiwanda Peaks on middle day.
Day 1: Icehouse Can Trl to Comanche 5.1 mi (7.0 via Chapman)
Day 2: Comanche to Icehouse Saddle 1.6 mi, Icehouse Saddle to Cucamonga 2.2 mi, Cucamonga Pk to Etiwanda Pk 1.0 mi, Etiwanda Pk to Icehouse Saddle 3.1 mi, Icehouse Saddle to Comanche 1.6 mi. Sub-Total 9.5 mi
Day 3: Comanche Camp to Icehouse Can Trailhead 5.1 mi via canyon (7.0 via Chapman)