I personally love the Dining plan. I was at the parks alone in May and I enjoyed having the plan. I got seated at every place I wanted, and I booked approx 5 days before I arrived. I even got Canada and Italy. It was different eating alone, but I talked to people seated near me and had a great time. I like having the meals pre paid so I can spend all my money on margaritas and stuff to bring home. And my meals always go way over what I paid for the day, I usually take dessert home with me and enjoy it for breakfast the next day with a cup of tea even when I am staying in a studio.
You will have to buy the plan for all 5 days, but you won't have to buy the plan for your 19 month old, the plan is for children 3-9 and adults. They will allow you child to eat from your plate at all the sit down restaraunts and if you ask they will bring you a small portion of macaroni and cheese for free. I brought my nephew one day with me and they were very accomodating.
I would recommend trying the restaraunts at the resorts. We can all recommend our favorites.
I did eat at the restaraunt at SR one evening on my last trip. It is a very nice place but I thought they needed a larger menu. They really didn't have the variety that most other restaraunts have, it seemed like they had one beef, one chicken, one pork, and one fish choice. I had the steak but would have preferred a few different choices.
You can also go over to Poly and eat at Ohana's or maybe do the luei (sp). I took my boys when they were 6, 8 and 9 and they hated it so try and see it now while the baby is young and won't be bored. You can either put him/her in a high chair or bring along your stroller.
On the day you go to Sea World you can make late ressies for dinner somewhere at one of the resorts. Sea World closes earlier than Disney and most of the resort restaraunts stay open till 11. Make ressies for the last seating and have something small at Sea World to hold you till dinner. I would not recommend late seatings for Ohana however, I did that once and we got the driest left over pieces of meat I ever tasted. I saved all my snacks for the last day and then went to DTD and picked out cookies and snacks and had them put in a big box for home. I gave out the $4 cookies as souvenieers and the family thought I was the best. They like that more than the cups and statues etc... I usually bring home.
You can pick up jarred baby food at any of the baby care centers at the parks if you can't find something for the baby to eat, or go over to one of the grocery stores in the area or
Walmart and get the junior foods to carry just in case the baby wants to eat at a different schedule than you. If you prefer to warm the food you can bring it into the baby care center and warm it in their microwave and use their high chair to feed the baby.
Let us know what you decide. Peggie