It wasn't that long ago when hordes of hikers took advantage of short-staffing in SEKI due to the pandemic to illegally flash-mob Rae Lakes and make a big party mess there. Not only are those high altitude environments sensitive to too much human impact, but doing so right when major forest fires were breaking out severely taxed the remaining rescue crews. Over 500 people were on the search list at one time. I'm not aware of any that actually died; but there were cases of serious smoke inhalation requiring hospitalization, and also some burn victims. And yes, search and rescue folks had to risk their own lives. Even flying helicopters in those conditions was very dangerous.
UC research crews have the keys to the Bristlecone gates, and even past the 11,500 foot gate clear to the 14,200 ft summit. But someone might figure out how to get into Bristlecones via one of the secondary Jeep roads. The main one of those is officially closed at the moment due to storm damage; and who knows about the others? There is only one Ranger assigned to safety patrol in that entire giant preserve; and it would be a heck of a place to get stuck. Very little water around, getting very cold at night, and darn few people any significant distance from the main ridgeline road.