Agreed! My oldest was 5 months on her first trip east to WDW, and the 2nd was 10 months. Thank goodness you have the extra hands. I did find it much easier only having one of them at the younger age. We were by ourselves for our first trip to WDW after we had the second. It wasn't bad, but still hard as they were both under 3.
We have learned that we should just plan on a hangout type of trip while they are little. Have absolutely no expectations when you are there. Don't plan on doing anything purposeful (ie commando-style touring), except your ADRs. That way, you can enjoy taking photos of the baby in all sorts of settings and just really enjoying the family time.
That being said, don't completely let the baby rule your time. What do I mean by this? Be flexible in how you parent - don't assume you must do things routinely and by the book at all times.
1) Put all things you need to grab - like bottles and diapers - in a convenient, easy access part of your stroller. That says it all - don't unpack everything when you need something.
2) Grab and go became my motto. You want to be able to move you and your items in the least possible amount of time when getting on and off transportation like the buses. If you spend all of your time getting situated, you will miss the relaxing part of the trip.
3)Don't overpack the stroller. Don't take 20 bazillion things. 1 diaper bag max. If you have a saddlebag or one of those quickie SkipHop changing pad totes (has room for 2 or 3 diapers and a travel pack of wipes), feel free to add it on to the list. That counts as a grab and go item that you can restock from your stash. 2 blankets max - 1 small swaddle to cover the baby and 1 bigger one to throw over the stroller during naps. You can always buy more diapers and wipes and binkies and whatever you need at Baby Care. Take 1 extra outfit, two if you have a puker (like my #2). You can always buy another outfit in the shops.
4) Maximize your time - nurse/bottle feed when convenient for you. Snacks are good. The baby may not completely realize it's hungry, but will when you whip out it's food source! It's okay to take a baby bottle into attractions. It will stave off crankiness that comes from long waits in line.
5) The sling is your ticket to piece and quiet. That soothing motion from rocking while you are shuffling through the queue is solid gold!
6) Be organized just enough, so others can use your down time to their benefit. That seems simple, but it's not. People are polite and will offer to wait with you. This can be a time waster that can eventually lead to resentment from fellow travellers - "What, stopping again?". Let others in your party go on ahead to attractions, meals, etc., if they want to. They can get you a rider switch and you or another can finish caring for the baby in leisure - knowing that the switch pass will be waiting for you when you get done. There really is no rush to doing the switch immediately when the rest of your party returns, either. Take your time!
We learned these valuable lessons from going with another couple who have a daughter the same age as our oldest. Their parenting style was vastly different from ours. For the first year of their child's life, they would only change a diaper at baby care and that meant hauling all the way across the park and then back, instead of using the available tables in all the bathrooms. Where I would nurse our daughter on long rides like IASW or during stage shows, they would have to stop after the ride and then bottle feed and then start up again. With her solid appetite, we were stopping for this every half hour. That often meant watching them completely unpacking and repacking the SUV of a stroller they had. The difference in our styles really opened my eyes as how I viewed my experience at the parks and made me conscious of how I organize myself when we visit. The 4 of us adults all laugh and we can openly tease them about it now that they have their second child! They still have some of the old habits, but they learned a lot about felxibility along the way!
At least you won't have to worry about what was our biggest challenge - the time zone change from CA to FL! We couldn't get them down before 2:30am on the first night there, after travelling all day. (We missed our red-eye the night before, because I got work-related stress illness 6 hours before the flight. Making that flight would have eliminated the issue, I think - we're trying the red-eye again in January.) Needless to say - they went to bed late and slept in. We never seemed to make it out of our room until 10am or so. Thank God for the Albertsons grocery off Orange Grove and the 1BR kitchens!