Thanks everyone! I think at this point, I'll plan to take a cab on my own (being alone for a few minutes might be bliss) and have my sister meet me in Epcot with the kids. Fortunately, my oldest daughter is not cursed like the directionally challenged side of the family (hardest hit are my mom, sister, and cousin who, ironically, fixed satellite relays when he was in the army). Amara was able to lead my mom from Norway through the world showcase to the YC last summer at night. I think she can probably handle things during the day. And my sister, at least, is willing to ask for directions.
I've not gone to the pool parties at the YC/BC, but I assume they are similar to what happens at AKL. My kids love them. Love, love, love them. They are pretty much geared to the tween and under set. Different games are played for small toys (sunglasses, sometimes tiny stuffed animals). I'll have to ask my oldest if she can remember the specific games. Bingo is always fun. One year, my oldest daughter won a game and got to pick a huge playdough set (which barely fit in our luggage). First time playing bingo - it's all pretty much downhill after winning playdough...