@bobjonkman I didn't know that Presto cards could expire. But you can now pay by tapping your credit or debit card, and get the same fare as Presto (unless you qualify for one of the discounted fares, but the difference in price probably isn't worth the hassle, if you're using GO so rarely).

Though, also look into a weekend day pass. A day pass could be cheaper than a round trip fare, or even a one-way fare. The passes are a bit confusing, though. You have to load a web page on your smartphone, and "activate" it at least 5 minutes before you board, and you use that web page as your proof of payment. https://www.gotransit.com/en/partners-and-promotions/weekend-passes-with-go