I just checked website and weekend permits are booked through Aug for Vivian day hikes, I can do a M, W, or F hike before August 15th and am happy to arrange a permit if I have interested hikers, including at least one who has done Vivian before and knows the trail well. The website shows high availability for weekday permits from now through August, which was the farthest out I checked.
Thx and hope I can get a good weekday group going or hop in on a weekend permit!