FIve of us did this as a backpacking trip over 3 nights on 7/2/18. Melissa K review is spot on. A few things to add
-Road to the trailhead is paved until 2 miles of dirt road. The rocks on the road made driving slower but not too difficult for a sedan.
-Mosquitoes may be few on the trail but near the lakes or staying overnight, they are LOTS. Be prepared with deet.
- This is not an easy hike and more difficult with a heavy backpack.
- The trail along the eastside side of Saddlebag seems really long but is much easier hiking than the rocky path on the west side of the lake.
-The trail shown behind Steelhead lake leads up the mountain to an abandoned mine. There isn't much of a trail, good luck finding the mine.
- Fishing is decent at Steelhead, Shamrock, and Helen lake. We didnt get a chance to fish Hummingbird or Odell but they looked great. Didnt catch anything over 12"' but saw some larger ones lurking, especially at Helen Lake.
- Couldnt find any suitable camping spots at Odell lake and only a few scattered sites at Hummingbird.
-HIghly recommend camping near Shamrock lakes and hiking the small mountain in the middle of the basin for sunrise. Spectacular views as the sun rises from up from Helen Lake

Flat but difficult hike, some parts a bit technical and scary with a pack. Views are well worth it! Great experience