I'd still rethink doing Disney! There is so much that a 10 month old can participate in there. My niece was that age when we went with my sister's family, and it was a very easy trip for my sister (she has 3 older kids as well, and was nursing so that makes it easier than taking bottles along with you). Her DD was very engaged with it all, and took a nap in her stroller every day. When we went to Seaworld, my kids and I didn't find as much we liked there. We're not into roller coasters, so we enjoyed a couple shows and walked around. Lakeshore Reserve looks very upscale! I've never gotten a getaway there, but have seen some from time to time. They have a little lazy river. Are you all sharing one condo, or getting two? That can be a factor in choosing where you stay too. If it were me, though, I'd shoot for Disney over Seaworld, but that's just my opinion.