A beautiful, safe, clean campground, run by the State of Hawaii, that can't be beat.
This campground is nowhere near the beach, but brings you to the interior of the island. From here you can view the Kalalau Valley lookout and look out over Waimea Canyon, known as "The Grand Canyon of the Pacific." Also you have access to hike the Alakai Swamp, which is one of the wettest places on Earth, or take a couple-mile hike up to the highest point on the island.
This campground offers indoor toilets and showers, a nice restaurant, and a gift shop.
Enchanted Rock is a huge dome of granite the rises up from the mostly flat area of Texas. It makes for a great afternoon hike or overnight camping trip, has excellent facilities, and is large enough for you to have a taste of nature.
There are two campgrounds, one is a hike in campground with a 1-3 mile hike, and the other you can drive up to. While there are usually some people up late talking, it's a pretty quiet campground. There is zero traffic noise, and if the moon is up you can go up on the rock and have a magical night.
Beware the summer nights in Texas. I went camping here in July and it was really too much. It doesn't seem to cool down at all at night. I think the granite holds the heat. Come in spring or fall for the best time. Reserve your site online well in advance.
Bastrop State Park has excellent facilities including hot showers, indoor sinks and toilets in modern, clean, and well maintained facilities, managed trails, and a pool! It can be a little noisy around the campground, and there is road noise as well from the highway. It's not really a "Nature Experience" but it is easy, clean, and fun. If you are a hardened backpacker you might want to go to a county park, but if you want to introduce your kids or partner to camping, this is the spot.
You can reserve a campsite online, but plan ahead! They sell out. Also, if you are going during the summer months, beware! Texas heat in the summer can be dangerous. Best months are spring and fall.