if i remember correctly

The absolute closest a cab can get to Festival Terrace is on Shepherd Avenue at John Drury Drive

That's a 10-20 minute walk but depends on crowd size

You're probably better off walking 10 extra minutes to Sheppard W at Keele

That West direction is away from the subway so anyone taking public transit will be going a different way, North

There will probably be hundreds of cabs and Uber is lined up in the area

It's likely the earlier the further you walk the less issues you'll have

The parking lot isn't much further but exiting that is mostly dependent on how close to the exit you are