Alaska is a big state, and within that big state are 17 units of the National Park System spanning more than 100 million acres. Denali, Glacier Bay, Kenai Fjords, Katmai, Wrangell-St. Elias are just some of those units. But if you want to visit the parks in Alaska, how do you decide which ones to explore? Contributing editor Kim O'Connell recently spent 10 days in Alaska with her family, and is here to discuss her travels in Denali and Kenai Fjords and offer some suggestions on how to decide where to go in Alaska.