This campground was the largest by far we saw on Maui - it was a large grassy area down a road past the visitor's center for Kipahulu. The area is for both tent and car camping, and there's no separate parking lot for tent campers since it is a bit of a walk from the visitor's parking lot. There's no running water, but two small buildings with pit toilets inside and hand sanitizer. There's also a group area that I believe needs to be reserved ahead of time and is at the back of the main camping area, as well as a trail off the campground that leads to shady tent camping spots (you definitely couldn't get a car in there) under large trees. We liked the campground a lot, especially how grassy it was (rather than dirt, like at Olowalu) but unfortunately we stayed on a Friday and Saturday night - and boy did the other people there like to party. We spent the first night stuck next to a HUGE party that didn't quiet down til late at night. Even after moving our van to a spot farther away from them, we realized that there were quite a number of groups partying til late at the site. I bet this wouldn't be the same case on a weekday night, but it's good to know that this campground is popular with the locals/residents on Maui and from other islands - probably because it's so cheap and accessible ($25 for 3 nights, which is essentially your entrance fee to get into the 7 sacred pools and hike the Pipiwai Trail). 

As for Kipahulu itself, it's a beautiful place. we swam in the 7 sacred pools (which get pretty crowded in the afternoon from day tourists) and hiked the Pipiwai Trail. We LOVED Pipiwai - it's a bit grueling, and is 4 miles there and back, but the 100 foot waterfall at the end of it is incredible and a must-see. For the price, Kipahulu is a great place to camp at, and to make the most of your money, I'd suggest spending a night or two here and then heading to Hosmer Grove on your way to the summit. Note that there's no running water here, so come prepared with water jugs. While there's running water in the bathrooms at the service center, as well as a water fountain to fill up your water bottle there, there's no faucet or anything that you could use to fill up a big water jug. One of the major downsides to the site, in addition to the noise.