I completely agree, reschedule now. If you've never been through a hurricane then you may not understand what a mess it can be before, during, & afterwards. Besides the potential damage to your RV, there can be food, gas, water shortages. If you need to evacuate when the storm is approaching, you can end up stuck on the highway. I have personal experience with that. I was on I-10/Hwy 90 as Hurricane Opal was heading our way, many years ago. Went to bed the night before not expecting to have a storm and then it turned. A 2 hour trip turned into almost 11 hours with winds and rain.
I understand that you don't want to miss out on your time at Disney, I just cancelled my trip, too. We are really bummed about it but that's life, unfortunately.
Best of luck in your decision!