I have limited time in the area, are the Jedediah Smith Redwoods State Park and the Trees of Mystery something that can both be experienced in one day?

Last month we did both in a day successfully. If I were to choose, I would prioritize JS. When you visit, drive the whole loop rather than go in and out the same entrance like Google routes you.

Yes. JS Grove is great, can do short walks around picnic area even

definitely plenty of trees to see. If you're trying to get up to see the boy scout tree which is the largest tree in the park we did the hike in about 4 hours. There and back.

Yes

Swimming in the river hiking and picture with the trees.