You have several options for paying dues. As mentioned, the bill will arrive in late December and is due January 15 (late as of Feb. 15). At that time, you can pay in full by check or by calling Member Accounting and paying in full on a credit card.
You can also continue to pay monthly by having it directly deducted from a bank account. There is no interest or fee charged for this.
When you pay off your loan, check with Member Accounting on whether the automatic dues deduction will continue or if you have to re-establish that option (or if you want to change to another option).