I was wondering when you would do your usual pre-D2R2 hill workout! Six repeats is pretty impressive, and it looks like you did them at a good pace. Your hill seems pretty comparable to S. Sugarloaf, and there's no way I'm doing six repeats on that hill, or anything close.
As to the rest of ride ... That's why I carry a phone, and have in mind who I can call to bail me out.
I had the phone, but no reception on Great Blue for some reason. Plus would have had to call Judy, and she was at work.
I would like to try S. Sugarloaf, it appears to be a bit more climb, but a little shorter, so a slightly higher overall gradient.