Collecting NASA Space Artifacts and Memorabilia

Am curious how many others on this board who collect NASA Space items but remain "in the closet". In my case, I focus on finding, documenting spacecraft components from the US Space Program (launch vehicle propulsion (rocket engines) , spacecraft systems used by the crew during flight or to support habitabilty/survival in space, Robotic spacecraft systems, experiments ect). However there other aspects to collecting "SPACE" to include autographs on (you name the item), flown momento's like flags, pins, coins; philatelic items ect, lucite encapsulated parts/pieces, books, models ect. If you do collect, how do you store/display these items; and how do you use them to support advocacy for US Space initiatives like Project Constellation? And as we close the 50th anniversary of the Proj Mercury, Gemini and Apollo, what, if any role do you see your collection playing to commemorate these truly historic milestones in human history?

Scott,
I am a small time collector. I wish I could do more, but I don't know where to look. I started back when I was a young boy in the 60's. I wish I had more, more more....

Not sure how too answer your other questions. Everything I have, I keep close. But I do show some things too kids, when I volunteer.
I think our history of the adventures of Man and Unman , as well as other things, should be preserved.

Just my 2 cents
Bill