Sitting on Hawaiian Airlines bound for Kailua-Kona, I got stuck in a middle seat between a man wearing a suit and reading legal briefs and another man, sleeping, who looked like he just left the beach, wearing Locals slippahs on feet pasted with sand. Sometimes, I feel self-conscious traveling alone throughout Hawaii. Not this day. Not with these guys. They didn’t bat at an eye at me, traveling alone. The theme of this trip for me was national parks. There are five national parks on Hawaii Island. Five. One island the size of Delaware. Five national parks. I had no idea. Did you?