Cache is NOT at posted coordinates.
In order to find the final location, you need to complete the nearby Adventure Lab - Murals of New Hamburg. https://adventurelab.page.link/UJfk
The five stages will give you the needed numbers.
Unless snow clearing on sidewalks is an issue, this should be wheelchair accessible.
N 43 22.EDC W 080 42.BA8
https://adventurelab.page.link/UJfk