I went up yesterday (6/20) to check out that area and can confirm that all of the gates on the road are open. Although it's possible to drive right up to the Portal store, I saw at least 5 cars parked in the dirt area just before the lower gate. Perhaps they arrived there earlier in the week when the gate was still closed.
The parking lot just outside the store was a bit less than half full yesterday afternoon and almost completely empty by the evening. The restroom/outhouse that's closest to the trailhead is open. I also noticed that the lights in the Portal store were on, and that there were handwritten paper signs placed on cones outside the store that said "entrance" and "exit". I assume that it's open even though no food is being served at this point, but I didn't investigate further and cannot say for sure.
As far as the trail goes, it's fairly easy to cross both Carillon Creek and the North Fork of Lone Pine Creek without getting your feet wet. There were also some flowers and even a few snow plants along the trail. Pictures are at:
http://www.whitneyzone.com/wz/ubbthreads.php/galleries/57358/whitney-portal-area-6-20-2020 for those who're interested. I didn't see any rangers that day but chose to respect the closure and turn back at Lone Pine Lake.
edit: Bugs were a problem when standing still but not a big problem. I didn't get bitten or use insect repellent or a head net, but I did wear long pants, hiking gloves, and a hoodie to keep the bugs away.
