We take an annual beach vacation with about 15, my sister and her kids, my family, and some SO’s, love it but it’s a lot of work, grocery shopping, cooking, cleaning, laundry, it is sometimes overwhelming even though we’ve find it for about 10 years. Since it’s just 2 families and we are close, it’s not crazy financially (as in how to split costs), I think a cruise would be so easy. RCL, NCL, Carnival all have ships with fun extras for kids.