I'm not "into" stamps, but I've been going through my Dad's old saved treasures, mostly aircraft related; he started his aviation career in the 1920's and was a test pilot for Fleetwings in the late 1930's and much of the 1940s.
I know stamps are a "dime a dozen" - I bought strips of 5 (if that's what you call them) of the 1962 Seattle World's Fair and the Project Mercury stamps back in the day figuring they'd fund my retirement some day. I'm still waiting.
Dad was also an avid hunter and "helped" wildlife whenever he could, including "game feeding" from his airplane to prevent starvation during cold, snowy PA winters in the 1930's. So I wasn't surprised to find this amongst his treasures:




I've searched the web trying to find info about the stamp documentation. (I've found lots of info about the stamp (first multi-color duck stamp). Is the documentation unique? I would think a collector would value it. How do I find it a good home (grandkids aren't interested).
Dad was also a pilot for the 1938 National Air Mail Week and saved numerous letters from that event such as this one:


I found places on web to post pics and documents of his saved aircraft memorabilia - is their a website audience that would be interested in seeing his National Air Mail Week memorabilia?
Thanks for any and all advice.