In reply to wave1art:
As an on-line resource I'd start with the Mountain Project website here:
http://www.mountainproject.com/ which is very good indeed in my view.
Perhaps the nearest thing to Rockfax is Supertopo who do selected guide books and have a helpful website here:
http://www.supertopo.com/
Falcon do a series of state by state selected climbs guide books.
That's about all I know on the resources front. You seem to have picked the plums when it comes to venues, but if you're heading North from Utah into Wyoming for The Tetons (or vice versa), and you can fit it in, I wouldn't miss The Wind Rivers Range, especially The Cirque of The Towers.
On the where/when question, maybe earlier in your trip it'll be cooler in your most Northerly locations? I don't know as I haven't been there. If in Yosemite NP early in your trip and it's hot in the valley it should be perfect at Tuolomne Meadows. Red Rocks seemed to us to be perfect in mid October. If you do go there don't consider any guide book except Jerry Handren's.
You might consider a deviation which can be done in a few days from Las Vegas to have a look at Zion Canyon, whether you intend to climb there or not - it's as impressive in it's way as Yosemite is. And 50 miles further is Bryce Canyon - no climbing but the craziest landscape imaginable.
No doubt your friends in Colorado will have all the gen you need but we particularly liked Eldorado Springs Canyon near Boulder and Lumpy Ridge at Estes Park beside Rocky Mountain National Park, which of course also gives you many many Alpine style rock climbs. Incidentally it also gives you access to the village of Nederland with it's hippies and excellent micro-brewery! (several good ones also in Boulder). The Black Canyon of The Gunnison is also ( and here I just have to use an over-used expression which I hate) "awesome", and not to be missed.
'av a good 'un - how can you fail to?!