I lived in Hawaii in the mid 70s. I used to do some day hikes on Oahu but never camped out. Started out getting a bit lost on some trails until I finally figured out the turns to malka or makai were not north or south east or west but toward the sea or toward the mountains.
One of the guys on the submarine crew was an avid backpacker. We had 30 days off at the end of each sub patrol so plenty of time for a single guy to go off on long hikes.
He started out getting space available flights to Australia and then later to New Zealand after points of interest in Australia became to long of a train ride to see much but outback desert.
Later he started doing hikes closer to home. I still remember seeing the pictures he had taken during a hike at Haleakala park. A lot of them similar to your pictures. Rain forest on one side and desert on the other.
He had a set of pictures with panoramic 360 degree view from some point in the park where you could see the vegetation change from green to desert and then back to green. Turning and snapping off pictures with just a slight overlap. I often wanted to join him but abandoning my wife after being gone 3 months was a price to high for me to pay. Besides the rest of Hawaii was fun for me, us , my wife and me. Though some guys never got over rock fever. For me even an island was spacious after being locked inside a steel tube for 72 days at sea.
Great pics. Thanks for posting them. Guess if I go back for a visit I might as well leave the hammock at home though.