Vancouver in early spring gives you snow-capped mountains right behind the city while you walk the seawall in mild weather. Booking now beats the massive summer hotel spikes and the crowds at Stanley Park. You get the best of both worlds without paying peak season prices.
A typical trip runs about $2400 for flights, a place to stay, and food. Spreading that cost out over time makes the math easier to manage while you lock in your dates.
Just remember that 0% intro APR for 15 months on purchases and balance transfers is a deadline, not free money. If you still have a balance left when those 15 months run out, interest kicks in on what is left.