Cache is NOT at the posted coordinates but I highly doubt you will find the cache without going there. The posted coordinates are a virtual stage. You don't even need to leave your car, motorcycle, bike, or whatever conveyance you arrive in or on. Please don't look for a physical cache as it may alarm the neighbors. Our home is to the south of the posted coordinates so if we see you we'll wave.
The cache can be found at N 42° 02.??? W 87° 45.???.
You just need to figure out the last 3 numbers of the North and West coordinates. It will be pretty obvious once you "find" the numbers you seek. I may add hints or elaborate more depending on feedback.
Chmmyr: Tbbtyr vf lbhe sevraq
Culfvpny pnpur: Fbzr crbcyr unir fcbggrq ohssnyb whfg unatvat nebhaq ng guvf ybpngvba juvyr erfgvat gurve jrnel srrg.