> I would be interested in any other areas that you think will be troublesome.

I think everything else is just covering miles of trail or snow, none of it significantly steep.

Now for a different perspective. Bob R hiked to Bighorn Park, and posted some pictures. Here's one. Bob's caption: Maria, Tracy, Davey, and Chris just dayclimbed Whitney

Maria is an Olympic speed skater from the Sochi Olympics, long program. Tracy and Davey just took over the Whitney Portal Hostel management. Tracy and Davey are hardcore distance hikers, but I've seen them shy away from the Mountaineers Route, so light on the technical side. If they are able to get up and back in a day, then I am thinking mwood will do fine. Davey has posted in the past, but doesn't write much. Mwood, you might phone up the Hostel and ask to talk to them. They can tell you what they encountered.