How long are you staying? In 2 days when you arrive, the storm is still going to be *well* down in the Caribbean. There should be no effects at all for several days after your arrival, at the least.
If/when this system crosses over Orlando, it will probably be little more than extended rain & more wind than usual. Much of the property's electrical lines are run underground, so you might not even lose power. For actual hurricane conditions to cross all the way into the middle of the state & affect the parks, it has to be a significant hurricane before it ever hits land, and be aimed right at Orlando. If it comes onshore down at Miami (for example), then it will lose much of its strength before it ever gets to Disney. Not to mention, storms are more likely to swerve off in another direction than to take aim at Disney property, just based on sheer probability.
Your most likely effects will be more rain than usual, due to extended bands of clouds that fan out hundreds of miles from the eye of the storm. Poncho it up, bring extra pairs of dry shoes, and slog it out. This will help your crowd conditions, when all those people made of sugar stay home lest they melt.
Disney rarely, rarely, rarely has any effects from hurricanes other than rainy weather. Park closures are extremely rare, and sometimes have amounted to only a morning closure & then open by the evening. Like I said... it has to be a major storm, aimed directly at Orlando, coming onshore at the closest proximity possible, in order for you to experience what you see on the Weather Channel when they're flopping around on the beach in their yellow slickers. And if that does happen, then you just stay in your room where you should be perfectly safe. Disney will make sure you are kept up to date with any info you need.