I remember attending at least one of those Pisek Picnics, but I don't recall which year - it had to be in 70's however.
I'm afraid you have me at a disadvantage - you could be one of four daughters I have on record. I calculate that you are 3Cousin 1Removed to me. If I have your mother's original name correct as MAJERES - then I am further interested - my brother's 1st wife's name was MAJERUS from the Bellechester, MN area.
Call me some evening.
Frank