I'm sorry this is going to sound really rude.... but being honest
(part of my new year's resolution)
1. I hope we're not at Fort Wilderness the same time as you. I've saved my money for Disney and understand the cost... I don't want to have to listen to a grown man whining over a few bucks...life is too short.
2. I'd worry less about the mouse getting his and more about the horrific gas prices that I bet will go up and down and back up again while you're driving the 500 miles. It's just part of it... you pay what's current at the pump daily... pay what's current in Fort Wilderness.
3. Call Disney to confirm as was suggested... suck it up. Again... life it too short to get worked up over "principal" which in this case.. sounds like "pride" to me. Of all the things wrong in this world... paying the current asking price of $5.00 more per day... seems so trivial and silly.