Spending two nights in Port Angeles gives you a full day to explore the park as well as your two travel days from and back to Seattle. This means you can spend a full day exploring the Hoh Rain Forest or Cape Alava and still have time to see the closer sites like Hurricane Ridge, Lake Crescent, Dungeness Spit and the like. Use this travel planner to get some sense of the exploration and driving times. Even at a given site, there is often a lot more to see, and you don't want to be hurried After all, you are here on vacation.