Fastest way to redial...

I live on an island and the ferry service has installed a first come, first served phone dial in system that takes calls for boat reservations at exactly 5:30 AM. At 5:29 hundreds (so it seems) of people start dialing, get a busy signal, hang up, redial, busy, hang up, redial, etc. The faster you can cycle through this the better your odds are of getting through and get a reservation. I have the BB (Bold, 9780) set up with a speed dial but was wondering if there were any hints, tips, tricks, or apps that might speed this process up. Or maybe there is software that would work on the computer. Your help to get me to front of the line would be appreciated!

Bob