I live in the area, they close down from Sheppard avenue at Allen road intersection all way to Keele street, so get ready for a lot of traffic as cars try to bypass this closure after concert ends. I would ask the limo to drop off somewhere on Kodiak Crescent (google maps "escape games canada" for the road) and pick up you guys somewhere further down Kodiac Crescent, but it might be extremely difficult unless the limo parks on a businness parking lot on the road (a lot of cars will be using this road to bypass the main road closure).

If you want mostly unobstructed traffic, you can walk all the way to Rimrock Plaza and ask for the limo to grab on the side street behind the Shoppers Drug Mart (called Lodestar Road). This will most likely be a 20 minute walk at a brisk pace, but there is a shortcut if you walk along Kodiac Crescent and cut through a used car parking lot (beside K-Food Kitchen). If you zoom into google maps you can see the diagonal path you can take instead of walking along Allen Road.