We were without power for 21 days with Frances and Jeanne (overdue with Baby Lily at the time) and 11 days with Wilma, which sounds very dramatic but really wasn't bad at all.
My advice is to lay in all of your hurricane supplies early (I do it in May) so that when you're under a hurricane warning you don't have to fight the throngs of panic buyers at the supermarket and Home Depot. It's a huge relief knowing that I won't be fighting for the last bottle of water or sheet of plywood as the storm approaches.
In addition to the things I know my family will need (shelf stable milk, canned goods, bottled water, batteries, diapers & wipes, etc.) I lay in some extras (plywood, extra flashlights w/ batteries, water & food, tarps, first aid supplies, bleach) in case my neighbors need help (or we need more than usual to get through).
Don't forget to charge up your laptop and cell phone!
Good luck!
Heather