Here's the most important thing (IMHO) you need to know: it's going to be 90 degrees in Palm Springs on Sunday. Yes, because it's still (supposed to be) winter, nights are still cool, and starting very early will mean you will escape the majority of the heat. However, should you need to retreat, i.e. one of you gets tired and bonks and you have to turn around and go back down, you will be very uncomfortable, and you could get in a 'situation'. We had a heat-related rescue on Monday, where a woman attempting Skyline ran out of water and began cramping and required a rescue. So, I'll leave others to advise you on the ice (which probably is still present in the chutes and hazardous, so I would bring crampons, too) but my advice is a pre-dawn start, so that if a retreat is necessary, it will happen while temps are still reasonable. You don't want to be coming down Skyline at 3 pm when temps are ninety. Also be aware that nearly the entire trail is unshaded and the sun is beating down the whole time. The woman who got rescued on Monday called for help at 11 a.m. Granted, perhaps her fitness levels were just very low, but my larger point here is that temps have been running fifteen degrees above normal the entirety of the past month. It appears that global warming is causing conditions on Skyline in February to more closely resemble those in May. The new normal?
And of course, carry plenty of fluids.
Q: How many therapists does it take to screw in a light bulb? A: Only one, but the light bulb has to want to change ...