Those places look awesome. I've been to Hawaii twice before, and I haven't been there. These are small islands but there are a lot to see. Swimming near the falls, awesome view, red(?) brown sand, and even more gorgeous scenery. I can see why that 8-10 hour drive was worth it.
Yes, space and time are both deceptive there :)
For an island that tiny I don't think I have seen even half of it after 10+ visits