We realize that climbing unguided increases the risk and reduces the chance of success.
Yes and no. Consider how you define "success" - a good learning experience? A chance to mentally and physically challenge yourself? Real personal growth with respect so self-suficiency? Also, consider how valuable it is that the only people on your rope team will be people you have trained with for years. YOU get to decide exactly what pace you will go at, how frequently you get to take a break, and when you're allowed to take a crap. These things have a material effect on your probability of success. In short, I applaud you for taking it seriously, putting in the necessary time to train, and then going for it.
We went via Emmons-Winthrop in 2004 with a similar level of prep as you describe (on your blog). It was a great experience. Not without adventure, that's for sure, in spite of the fact that it is a trade route. If for some reason you change your planns and decide on E-W, repost and I can give you some specific pointers for that route.
Here are a couple of other points that may or may not be useful to you:
It's common for people to start too fast then burn out. It's less common for people to burn out who go slow and steady. Try for slow and steady. We took a 5 min break every hour, which forced us to eat and hydrate and prevented us from really wearing ourselves out. We went much slower than I've ever gone on a hike, and we still finished in a respectable time.
We packed food and supplies for 5 days on the mountain. We planned to hike in on day one, screw around/acclimatize on the glaciers on day two, summit on day 3, and hike out on day 4. A very reasonable itinerary with plenty of flexibility. And that's exactly how it shook out.
We planned to simply NOT climb if visibility was bad. Of course, one must be prepared if weather moves in while you're high on the mountain, but we planned to wait for a very good weather window in order to minimize risk. This decision is up to you. But if part of your safety system is to be able to follow a trade route, consider the value of good visibility.
Pressure breathe. It's very common to feel a little light-headed at altitude, and pressure-breathing really helped with that.
Hope that helps,
Brian