In my state, child support is based on 109 overnights, so you would probably want to ask for more than the standard child support.
Also, XWH demanded he have the first right of refusal if I had to work more than 4 hours, he got the children. OOPS,, he didn't realize it worked the other way, too. So, when he went to work and left child with OW, he had to go and get my child, as I am worried sick she is going to harm my children.
Also I learned anything basically is OK as long as you both agree. So try to think of what works best for you... You won't have set dates, except possibly holidays. And if your children are young and you want them for Halloween, be sure to add this holiday.