A key to conducting major research is to visit local archival & historical repositories. This gives you the opportunity to view important literary and historical documents first hand. By attending Eastern, you have some amazing repositories easily within your reach. Listed below are links to local museums, historic libraries, and archives that store and preserve historical documents. Often times these places are more than happy to assist you in your research. All it usually takes is a phone call to setup an appointment!
Digital libraries & archives are great ways to view primary sources or full texts without having to travel anywhere. Listed below are a few digital collections of American literary greats.
Many libraries will at the very least post a collection's finding aid online. To search for these, try typing the author's name followed by "digital papers" or "collection finding aid". For example, Princeton has a large collection of F. Scott Fitzgerald's papers and writings. They are not digitized, but, you can see a list of what papers are there and discover it may be worth a trip to Princeton to see the materials in person.