"It all has to do with peace and tranquillity," he says. "Whenever I take my kayak out, I'm seeing turtles and brown pelicans."
Moment that made him smile: Raising a camera to photograph a young couple at Bodie Island Lighthouse and seeing the guy get down on one knee.
"I'm like, 'Oh my God, I think I know what is going to happen,' " he says. "I just went crazy taking pictures. There are a lot of (wedding) proposals at the top of lighthouses."
Gamman says the woman accepted, and he was happy to share news of the marriage engagement with the other guests on the tour.
Oddest moment at the park: A music teacher giving students a demonstrative lesson on sound resonance by playing a didgeridoo, a wind instrument used by Australian aborigines, at the base of Cape Hatteras Lighthouse.
"It was way out there, but I really liked it," he says. "The crowd waiting applauded when he finished."
A ranger's request: Educate yourself about rip currents before entering the water and do not go swimming at sunset or sunrise. Gamman says rip currents are common at Hatteras because of small sand dunes that build up in shallow water. When the water gets pulled back out to sea, it punches holes in the dunes, creating the pull for rip currents.
Gamman says the way to escape a rip tide is to remain calm and float on your back. The current will take you out about 100 yards, he says. From there you should swim parallel to the shore until you clear the pull. Then swim back.
"People try to swim out of it and you can't," he says. "Michael Phelps couldn't do it."
Another park he'd like to visit: Dinosaur National Monument in Utah. The area features a combination of science, history, geography, petroglyphs and fossils.
"They've got dinosaur bones," he says. "How cool is that?"
What national park would you like to visit? Please share your thoughts in the comments section below.