Well, it can't hurt but I don't think it'll do much good. If memory serves, you reach about 80% of acclimatization after maybe 2 weeks (I think increase in red blood cells and other changes). I've found the most important advantage is to spend at least one day before a trip at altitude of at least over 9,000. Horseshoe meadow is a very good suggestion.
In my graceful old age, I'm now spending 2 nights at altitude prior to going into the backcountry for the season. Even though I don't suffer from altitude sickness (headache, nausea, HAPE etc.) I've found I feel a lot better on the first day doing that.
So the one night the week before won't have any lasting effect to the following week but if you can work in one night at Horseshoe, you'll be happier on the ascent.
g.
