Our oldest daughter was 6 months old the last time we went to Disney and she did great! She rode rides, did some people watching with grandma while we rode bigger rides and had a blast at meals.
We opted for The Crystal Palace, Liberty Tree Tavern (it had Mickey characters back then), 50's Prime Time and Tappen Edo (which had a different name back then).
She loved the characters at the first two. She always went for their noses and would giggle from the time they got close to us until she lost sight of them. She would literally hang out of the highchair trying to see them as long as she could.
At 50's PT, we ended up at a table with a TV and she watched that for a long time and then played with the glow cube from DH's drink. And at Tappen Edo, she enjoyed the show and squealed with delight many times.
So my advice is to do a few character meals and then whatever you want. Make sure you have a few small toys that the baby can play with at the table, snacks, a sippy, etc and you should be fine.
Also, start taking the baby out to restaurants before Disney. Get him or her used to the sights and sounds and expected behavior of dining out.
We've also been quite successful with scheduling meals right after baby's feeding time...especially buffets. That way baby is running on a fully tummy, fresh diaper and is content which means we aren't fumbling with a bottle (trying to nurse) or attempting to spoon feed all while we're trying to eat too.
Also, we try to avoid eating during nap times. Most restaurants can't handle strollers inside and you don't want to cut a much needed nap short or try eating while holding a sleeping baby.
But good luck! You are going to one of the most kid friendly place in the country so with proper scheduling you should do great.
