Bill- am jealous you became a part of the Canyon before it disappeared. It must have been extraordinary. I do, however remind us all that in the time scale of the Canyon that 100000 years (when we may well hope the dams to be well gone) is only a blink of the geological-time eye... The Canyon will, someday "soon" once again see the light of sun and moon and stars. Since I am unlikely to be around then, I visit the lake every month with awe, wonder, and great respect. I suspect the "magic" is all still there. One must only open their heart and touch the slickrock to see and feel it all...
As an aside, the only place I have ever found on the Lake which resembles the Canyon in its day is a small canyon located off the Great Bend on the San Juan arm. Because it's located at a higher elevation, it is less subject to the habitat destroying effects of water level changes.
In this canyon, juniper, willow, boxelders, other deciduous trees, native tall grasses, rushes, ferns, deer, coyote, heron, canyon wren and flowers abound. In season, a small creek runs to the Lake. The old cottonwoods are all dead but there are few "tammies" - the invasive tamarisks that have overtaken most of the Lake's shorelines.
To the east of the waterline is a small arch, though you will not know it is an arch unless you walk under it and look up. Look down and you will see tracks of the trickster (coyote) who use the area under the arch as a den. Their dried feces contain nothing but crawfish shells. Seeing this was the first time I wanted to be reincarnated as a coyote.
A (careful) hike up the cliffs above the arch and a short jaunt to the south will put you on a cliff overlooking the San Juan. If you look carefully, you will find a tammy that lightning blew out of the ground. If only it would strike more often... A very short walk up the canyon (to the NNW) will reveal not one, not two, but three huge alcoves, each oriented to the west, north and east.
I spent 3 days there once, unable to pull away and return to the other, lesser reality.
The canyon is about half the distance from Wahweep to Oak Canyon from Oak Canyon. It's worth the gas. If you go, and you can't stay, take no food or water or you _will_ stay... Maybe forever.
37 16' 3" N
110 42' 25" W
Be sure to open your heart and touch the slickrock... You are in Glen Canyon.