This is a not to be missed destination. The drive up alone is amazing, you can feel the temperature drop and see the effects of the cooler weather on the surroundings. Do not get discouraged by the thick fog that might hinder your drive, just turn your lights and your blinkers on and tread slowly.
Once you reached the Main gate, most likely the fog will disappear, stop by the ranger station to learn more about the area, a restroom and chat with the rangers, they are super friendly! They showed my kids pictures of the crater at different places together with the animals and the plants that you can find around the area. Drive higher and you will be rewarded with stunning views. It is the type of eye candy that you can only experience here or in Mars.
Respect the area, stay along the trails. Bring proper shoes, water and a jacket if you would like to hike and explore. This is literally a place above the skies.