I agree with PP, do them on different days if at all possible.
We usually book the brunch 10:30-11:00 and I am still not starving at our 8:15 dinner time.
I mean, I eat at dinner of course, just don't really need to eat more than a salad though, but alas, I do
GET UP TO A $1000 SHIPBOARD CREDIT AND AN EXCLUSIVE GIFT!
If you make your Disney Cruise Line reservation with Dreams Unlimited Travel you’ll receive these incredible shipboard credits to spend on your cruise!