My best friend & I travel with 3 cameras and 2 phones between us....bahahha!!! We each have a DSLR and enjoy photography, and the 3rd is a waterproof shockproof that we usually had over for character photos since not everyones great with a DSLR, and we use it to video to vlog.
That being said, if the boys wont be down for photos, I'd just go with a phone, or if you have a smaller point & shoot, take it to not have something so heavy lugging around. Photopass generally knows how to use phones, to get some pictures around the parks! Memory maker can be quite pricey, especially if you won't be stopping a whole lot for pictures! It is more than characters though, main street, around the parks, sometimes they'll take random candids of you during events and pass the cards on to you. If you think it'd be worth it, that'd be easiest