In all honesty, if your young and strong, with no nagging injuries etc, I really don't think this plan is impossible.
Hell, I'm 66, with quite a few health problems, and last Sunday, I did 7 pitches of 5.10 trad and a few of 5.9, in about 5 -6 hours. Ya, I'm bragging but hell, I didn't start early, and really had no plan for the day either. It just happened.
Going to the Valley in 3 weeks and I must prepare-right?