Hey Chaser-
I have not done the peak in Vegas but sounds like you both will be ok from an endurance / stamina point of view. The only tricky part is snow / ice on trail, given the time of the year. Looking at the webcam photo I would wait and see how much snow we have had on the trail.
The cold was manageable up to 25ish degrees with what I was wearing and personally I should have carried less water as well.
So it all depends on snow today and tomorrow. Most lower regions are ok but once switchbacks get snow then I don't see a way up ex the 'chute' but that will no longer be just a run up the trail.
Hope that helps and others might have more insight on this....
