Thanks for the links! After some study, have narrowed the vastness down to some possibilities. Any experience or insight much appreciated. Have googled these, but if you have a particularly great link, please post that too! Many thanks!
Here's the possiblities:
Wolverine/Little Death Hollow Loop
Muddy Creek/Poor Canyon
Fence Canyon/25 Mile Wash
Fold Canyon to Fortymile Ridge trailhead
Paria Canyon-Hackberry-Hogeye
Dark Canyon – Basecamp, ramble around
Ashdown Gorge/Cedar Banks – Basecamp, ramble around