If ya left at 6am you'd be Rollin in close to midnight if things go well - coming out ya make more time though
. Fat soft horses and butcheeks ain't good the first couple days.
Summit cabin is about all I'd try. You'll need to do the zenda trail to blue grouse, not sure about the starlight trial. I'd be surprized if the outfitters string went that long in a day, I haven't been in in a while.
Take your time if ya never been in and enjoy the experience.