Between our two families, there are ~35 kids under 11. We would highly recommend getting babysitters in advance for the evenings. Summer Sitters is a local babysitting service we would recommend: https://www.summersitters.com/ The rates below include both the babysitter fee and the agency fee*. BOSTON & CAPE COD # OF CHILDREN TOTAL 1-3 children $33/hour 4 children $38/hour 5+ children rates vary