Many people describe Beignets as somewhat of a donut. They're dough, they're fried, they're covered with sugar - LOTS of sugar. But that's the end of the similarities. If you're looking for a donut replacement, this really isn't it. I wouldn't even say it is similar to funnel cakes. I would say, though, they are worth a try. I mean, you're on vacation at Disney - treat yourself!
Next piece of advice... spread out the napkins. The powdered sugar goes everywhere. I bet the Disney cast members at this resort clean up more sugar than any other dining location.
I highly recommend creating your own Fat Tuesday celebration at Disney's Port Orleans. Just don't forget the napkins...