I'd book ahead for that time of night. Had our neighbours over earlier this week and one set of them recalled a delayed flight arriving at YXX (Abbotsford, former CF base) at 0300. Those who did not have their cars there were stuck until the next morning. The other neighbour flew up to YWL (Williams Lake) and the airport closed after she arrived (they turn off all the lights). She said she had to wait in the dark for 45 minutes.