I've done both, but in a Model S 75D earlier this year. Yosemite is a cinch. I did a 100% charge at Groveland while having dinner (short walk from the SCs). We then checked into our lodge ~20 miles up the road at Rush Creek. We were able to go into Yosemite Valley and back to our lodge twice and still had enough range to make it all the way back to the Manteca SC with ~12% battery remaining. Temps were in the 30s / low 40s during our visit, and I believe I averaged around ~300 wH/mi during this road trip.
As for Sequoia/Kings Canyon, we were there about a month ago - if you want to stay in the park, I would recommend staying at either John Muir Lodge or Wuksachi Lodge. John Muir was EV-friendly and they let me charge overnight on a 110V outlet off their front deck. That gave us freedom explore the park, making it down to Hume Lake and back while blasting the heat because temps were in the low 20s when we made the trip. Wuksachi also has 110V outlets per PlugShare. Note that the park has gotten a lot of snow recently and they don't plow Generals Highway. Monitor the park website to see when Generals Highway does re-open. Consumption during this trip was ~330-340 wH/mi compared to my usual 270-280 wH/mi during my commute.
Have a great trip!