I hiked to Waimanu by myself in September 2021. The hike was definitely a challenge initially. I wasn’t as prepared because I had no sleeping bag or tent. Had to cross 2 rivers, the second river to the Waimanu camp site is about 3 feet deep so prepared to get wet. The views were gorgeous. Watching the sunset and the sunrise was a spiritual experience. I would definitely do this again. Of note, the outhouse was covered in bugs, be prepared.