We are going to Disney next week and our youngest turned 2 in July. She is tiny, only about 24 pounds, but I know that will still get hot and heavy so I want to be comfy, particularly if she wants it to sleep. But I also know she won't use it much (we are bringing 2 umbrella strollers so we will only need it when our oldest needs a break from walking) and don't want to worry about it getting stolen or taking up a bunch of space....I could do an Ergo or a ring sling. Thoughts?