MF are due around 15th Nov each year if they are not paid then you cannot book a vacation.
This as always been the case it states several times on the BG online that everything depends on your account being in good standing
Maintenance Fees are billed in October and due in November, unless you are a new owner who purchased in August, September or October. If your purchase date was in August, September or October of the current year, your Maintenance Fees will be billed in January and due in February.
taken from Bluegreenonline.com
What if I owe Maintenance Fees or Club Dues?
Your Maintenance Fees and Club Dues must be current in order to make a reservation. You can check the status of your balances on the Payments page and conveniently make any outstanding payments to avoid delaying the reservation process. If you need to reach us by phone, call our Maintenance Fee* department at 800.456.CLUB (2582), option 2.
also taken from Bluegreenonline.com