Just want to give people some insight. Got off Wonder today - May 13th. Left ship at 8:35 AM. Went to pick up luggage, clear customs and walk 5 minutes to Canada Line train station entrance. Purchased tickets to airport at $3.15 CDN per person - yes this is not a typo.
Took train to airport. Checked in, dropped off bags, cleared security and US Customs and into gate area by 10:20 AM this morning.
Hope this helps others sailing on Wonder. Best way to travel and cheap too!