If you’re flying an ultralight into OSH it is mandatory to consult the current year’s NOTAM. This is merely an aid that overlays the 2017 procedures onto Google maps.
Consider calling the NOTAM-listed phone number for ultralights before committing to find out if there is anything special like the field is closed due to an emergency or weather.
The entire field is closed for much of the day during airshow activity. Flying in during that may get you arrested and will almost certainly garner an FAA fine at best!
General airport info (ATIS): 866.493.5553
Runway 18/36 is the close north/south runway we have to avoid. A radio was not required as of 2018 but check with the current year’s NOTAM.