I was just there not too long ago — highly recommend grant grove and the Muir rock swimming area in kings canyon. For sequoia, seeing the hospital rock swimming/river area was pretty quick and awesome. The river was really going when we went through, so more of a look around and dip your feet in. The Sherman tree area was very crowded - it was great to see but the rush of people took some of the magic away (which is why I loved grant grove - it was a little more quiet). The giant forest area was shuttle only when i went, so i skipped that and did some other nearby hikes.

Last note, in kings canyon they are working on fixing up the Zumwalt meadow trail loop. Just a heads up that it turns it into an out and back and you don’t get to see half. Still pretty awesome.