Hi Erin,
I'd agree with the Aarons - from Scotts Peak return would be much nicer / quicker if you want to access this part of the range.
Are you going in with Mike? If you are keen to do Scorpio then staying at Promontory Lake would be ideal, as Carina Peak is also then very close (like an hour return), which is about (apart from Mt. Shaula) the only peak Mike missed on our traverse of the range with him in 2007.
From Prom Lake as a day trip you could also continue on past Mt. Scorpio & do Mt. Aldebaran & even Mt. Taurus, lunching at Haven Lake?
A great area, but I agree, a very specific plan? Why Scorpio in particular?
Other options could be to go to Lake Oberon return from Scotts Peak along the traverse track, a very casual 5 day'er.
If you wanted a specific mission from the Yo-Yo end you'd be better off staying at Lake Roseanne & doing West Portal?
Hope it all goes well whatever you decide, an awesome part of the state
Stu.