One week at altitude won’t do much but it’ll be better than showing 3-4 days before the race. Usually day 4 is the worst performance at long travel AND altitude increase. You’ll want to be training very lightly in those days as you rest up for the race. Hiking on the Plan (2200-2300m) is quite gentle and will be helpful especially spending a few hours there each day. Sleeping at over 2000m might prove to be a problem when coming from sea level as your sleep will be disturbed. Poor sleep in the final week has a negative affect on your race.