To write a journal about Wampanoag, you need to know about the people and the area. You can find information on that here: http://www.indians.org/articles/wampanoag-indians.html. If you're supposed to write personal experience and immerse yourself in the culture, as if you were one of them, you'll want to think carefully about what it would feel like to be a part of that community and the time period. Consider what types of activities you would do, and the kinds of things that might matter to you. That will help make your journal well thought out, realistic, and believable.
