Hi J.,
I know this sounds so ideal, but I would leave your 6 month old at home if I were you. Or leave them with someone you trust, is what I meant. We went to Disneyworld for our honeymoon and I have a 3 year old now and would NOT even consider taking him until he is at least 6 to 7 years of age. It is not a place for babies. They like a schedule and you will be miserable because everything you do will have to coincide with your baby's schedule. We saw a ton of families traveling with babies and the only redeeming thing they had was their parents along with them, so they could really enjoy some of the parks and leave their kids with their grandparents. Babies need so many things and whenever I traveled with Matthew, (I did make several trips) I always rented everything I needed from whereever I had planned to visit.
There is a lot of waiting in lines both for entertainment and food, so I would just not do it. But of course, that is my personal opinion. It is so hot there too, even though in October you wouldn't think so (we went in September), but the HUMIDITY IS SO BAD, after the first day I didn't even wear make-up because after putting it on, it just slid right off after an hour! It is really bad and with a baby....no way for me!! They get so hot, thirsty, and are not at all patient and it would just be really miserable for them.
Also, it is best to make reservations for any place you want to eat at with Disney characters. We got a book from the bookstore about exploring Disneyworld and it really helped up make an itinerary before we went. Also the only way to go is to stay on property! You don't need a vehicle at all, the buses run every 15 minutes to where ever you want to go. We spent 10 days and had a blast, but with no kids!!
Your 5 year old would enjoy it, but would they remember? I have often ask grown folks if they went and they said they did, but never remembered anything about it because they were so young when they went. It is so expensive go and I want to make sure that Matthew (my son) remembers all he saw and did! You spend way, way too much money and I just wouldn't do it with a 6 month old.
Again, this is just my personal opinion and not meant to offend you in any way! Sorry so long!
Thanks and Good Luck!
G. B.