Your question raises huge jurisdictional questions. If, as you say, EVERYONE left NV, you should not have had to return to court there, but there may be facts missing. Look at the article "The Basics of Family Law Jurisdiction" -- and the other materials -- posted at:
http://willicklawgroup.com/child-custody-and-visitation/
Then I strongly urge you to consult with a family law specialist knowledable about both custody and jurisdiction. On your substantive question (presuming NV really DOES have jurisdiction, which seems questionable), the answers are the usual options -- negotiation, mediation, or litigation.
Answered on May 11th, 2014 at 10:14 PM