Library of Congress, Travel for Research?

I had the distinct pleasure to visit the Library of Congress last year and now count my library card as one of most treasured possesions. The LOC has done such an amazing job of digitizing their collections and making them avaliable on-line that many of the collections that you would have to see in person.....Soon may come a time where a writer will only have to visit locations to see jealously guarded collections or those of such limited resources that they have not yet made them available on-line. Of course, I can tell you there is something magical about actually holding a primary source in you hands. Holding the actual general orders from Gen. Scott's headquarters in Vercruz and later, Mexico City.....it just makes a real connection that cannot be underestimated. When writing, I still plan to travel. For example, the paper of Thomas Jefferson...check it out, the link is below.

http://memory.loc.gov/ammem/collections/jefferson_papers/