On the rides - hold on tight. One adult should handle the bags or other loose items while one adult takes responsibility for the child without having to worry about other things. Mine was always enthralled with the ride and not too fidgety but Peter Pan always makes me just a little nervous because they could fall.
I don't plan very many shows, usually just one a day, maybe two a day but those would be spread out. And those I will try to get seats with an "escape" route if DD gets too fidgety, fussy, or whatever. Even though out group includes 3 generations, I pick the show that most appeals to the toddler.