Two of my Great Grand Aunts married Isler brothers of Adaline's. Frederick Thomas (called Fritz) Isler married Selecta Richard on 03 Oct 1876 in Canton, Stark, Ohio; and Henry L Isler married Mary Catherine Isler on 03 Jan 1881 in Canton, Stark, Ohio.
Sorry, I am not part of the Isler-Chopard families but I do have memorials on Find A Grave for Adeline and Fredrick Chopard along with their daighter, Matilda and her husband, John Benson, all buried at West Lawn Cemetery in Canton, Stark, Ohio. Adeline's parents are also buried there, I do have links to other Isler burials listed there.
I was aware of the Chopard-Isler reunions.
I do have a clipping from the Repository of Canton, Ohio dated 29 July 2007 in the Through A Century byline. Just a short mention of the members of the Isler Outing Club picnic held in Canton. If you'd like a copy, please let me know. Since this article was in Through The Century, there was likely a news report in the Repository in 1907.