However, if you do not pay in full your next opportunity will be when you collect your costume. As far as I can tell from that email payments in January will not be accepted EXCEPT on collection dates which will be revealed in a later email.
Now, I am guessing that the mas camp will be closed during the month of January for preparations since Carnival is so early and the band is sold out. The last week of January is Carnival week and the week when costumes are normally distributed anyway.
People were not paying attention when I kept saying that there is only ONE paycheck between now and Carnival!! So, scrape up your dollars in December, explain to people they will be getting no gifts for Chrisnival and pay off for your costume ONLY IF you want to be in the fast track line. If you don't care about lining up on collection day, don't sweat it, you still have the option to pay for your costume when you collect.