Kitten Adoption

So I found a kitten in my garage and I assume she was abandoned by her mother or got lost and wandered into my house. She was very scrawny and looked as if she hadn’t eaten in quite a while. I took her in and fed her some kitten milk and loved on her. Part of me wants to keep her, but then again, another part of me wants to take her to my local humane society. We live in an old house and there’s a lot of crawl spaces that she can get into because she’s so little and I know she can get into them because it’s still uncertain how she got into our garage. She’s a really sweet cat, but I don’t want her to get hurt in a crawl space plus I’m going on a 2-week vacation soon and I’d hate to keep her in a crate the entire time I’m gone especially since she’s so tiny and fragile. What should I do?