Glacial lakes really are that bright turquoise color you see online, especially in July and August when the alpine trails finally melt out. Banff and Lake Louise draw massive crowds for good reason, with jagged peaks and wildlife right off the highway.
A solid week up there from the US usually runs about $2,800 once you factor in flights, park passes, lodging, and car rentals. If you do not want to drain your savings in one shot, you can spread that cost out over time without paying interest.
Keep in mind that 15 months goes by fast. If you do not clear the balance before that 0% intro APR window closes, whatever is left starts racking up regular purchase APR immediately.