UWaterloo Campus

Lots to recommend (depending on where your visitor is going):

Q Lot (outside of EC5)
M Lot or N Lot (near the north Campus entrance, close to SLC/PAC)
C Lot (near the south campus entrance, close to SCH and HH)
H Lot (sometimes requires reservations, near the south campus entrance, close to SCH and HH)

Note: If you have a parking pass for main campus you can also park at the School of Pharmacy in Lot 3 when you are visiting Kitchener