Family of 5, all getting visas together

We are a family of 5, we are all U.S. citizens. we are all getting visas, but this is a second one for my husband and I, and a first for my 3 kids. What extras do I need to submit? Do I need to submit travel / hotel itineraries for each person,( 5 copies) or can I submit 1 as a family. Aside from pics, applications, passports, birth certificates, what else might I need to bring and how many copies? Thanks