Just want to clarify that I'm not a professional, I led a non-profit organization for divorced families for many years, so that's where my experience is from.
There are a couple of things that can be done: 1) ask for mandatory co-parenting classes - this is usually supported by the courts so not a difficult wish to get granted. Offering to pay for them increases the likelihood.
2) Ask for a right of first refusal-clause in the custody agreement. That will usually state something to mean that if one parent has to leave the children with a caretaker, the other parent has the right to get them before anyone else can be asked. That should also be pretty straight-forward, but remember - it goes both ways!
And read up on Parental Alienation. It is a concept that is being increasingly accepted, even in Family Court.
M 16 yrs, WH62, P54 3 adult blended kids EA 11/13, BD1 6/14 PA fall 14, BD2 2/15 Piecing 2015, BD3 12/15 Separated 4/16 WH moved OW in 5/16 Divorced 6/15/17