Depending on the actual drone (if it's a fairly nice one) the software may even prevent you from ever taking off depending on where you are in the park. I flew a $3,000 drone ($1,000 before all the added cameras, and sensors for safety) commercially for a little while for a company and the drone software knows exactly where you are from the GPS systems and can prevent you from taking off in a no-fly-zone like a national park and alert you. I was unaware at the time, but since the drone was registered, it actually alerted the FAA and they sent us a letter basically saying that they were made aware that we did try to take off, and that we shouldn't fly in national parks (basically a warning letter). The only reason I didn't get in trouble is that I technically never took off, the aircraft was only powered on and calibrated.
Depending on where you try to fly at WDW, you will probably be in mild to severe trouble for taking off. If anything, contact guest services, the concierge, or the front desk about the rules for the exact spot on property you intend to fly. You may or may not get permission to fly it, but more than likely it will be an absolute no. If someone does say that you can, I personally would get it in writing just so that if you get in trouble with someone like Disney Security, you have something that shows you aren't just lying to them.