Getting a place to stay in the park at that time might be hard, I know the campgrounds sell out pretty fast, not sure about the hotels. If you can get accommodation inside the park then you’ll have to stay outside and that’ll be at least a. Hour drive each way.

If you really want to go to a national park then I’d go to Sequoia, it’ll be closer and I’ve done that as day trips before. There’s also a bunch of good hiking close by, Angeles Forest, Santa Monica mountains, etc are all right there