When our kids were really young, we brought our live in au pair, which went so-so. When the twins were about 4 and my oldest about 7, we used one of the babysitting locating websites (either Sittercity or Care.com) to find a local babysitter. There were a bunch who applied, including several who were part time or full time CMs at WDW. After interviewing several, we picked one. The first few times, she came to our offsite rental house and watched the kids there. Once we get to know her, we started letting her take them around WDW with her. That was about 8 years ago, and she has watched the kids every trip thereafter and became a family friend. On our last WDW trip our oldest was 14 and the twins were almost 11 so we no longer needed a "babysitter". But we still had her come and hang out with them in the parks and then we all went to dinner together. So it has worked out fabulous.