You all know I reenact WW1 and WW2 as German WW1 Infantry, German WW2 Para, Finnish WW2 Jager, and Australian WW2 Infantry for Africa and Pacific. I'm currently looking into Polish 1st Armoured as well.
We don't just do non-public tactics, but also public events to educate the public about the war, the uniforms, and of course, the men who fought. Some public events we do have been to raise money, one was for a veteran's memorial in Bakersfield, another supports the Fort MacArthur coastal artillery museum, etc.
We meet veterans (often at public shows, but they also contact us), and do interviews/q&a with them, as well as support veteran's associations. Several modern day veterans from Vietnam, Gulf War, War on Terror, and elsewhere are reenactors themselves.
I personally have interviewed several veterans, including one who lives just down my street who was a PBY Catalina pilot in the Pacific.