I say snoop like hell....I think you have every right to know if he is screwing around...I'd be in his email, I'd put a GPS tracker on his car..I'd hire a PI to follow him next time he needs to deliver eggs..
and I'd also let him make his own arrangements for Disney..Like Ian...I say tough chitt on seeing his kids do disney...Dan's making this mess....it's pretty simple..it's his to clean up..