Late September is the sweet spot for Banff. The summer crowds thin out, the golden larches start to turn, and you get crisp hiking weather without the biting cold of winter. It is the best time to see the lakes before the snow locks them away.
A trip like this usually runs about $3200 for a solid experience. To handle this without a massive hit to your savings, we can look at the Citi Simplicity® Credit Card, which offers 0% for 18 months on purchases and balance transfers from date of account opening.
This is not free money. If you have a remaining balance after the 18-month window expires, the card will start charging interest on what is left.