Doing Baldy solo ?s

I am hiking San Gorgonio this Saturday and only have Baldy left. Been awhile since out there after a crazy August. Only Baldy is left for my 6 pack, and I have no one who needs it or can go with me on a weekday. I've done the Manker Flats trail up to the Ski Lodge in the spring as an exploration hike but snow level was at 8K so did not go higher, so I kind of know the area. I likely will go at a moderate pace as I want to enjoy this last peak of the 6 pack. Is Ski Hut a trail I can solo/is it ok marked? What about Backbone? Any tips appreciated...I just want to get it over with so I can finish my first ever 6 pack. Thanks!