Its a remote possibility except MIL works either mornings or arvo's and I dont know if FIL could cope with the kids for a few hours on his own. Plus they have no kid-friendly backyard and only 2 bedrooms.

My only other option is asking my parents. Their divorced and my mother is an alcoholic (not completely useless and she loves the kids so I dont doubt she'd be fine to watch them) BUT if they both came together atleast my Dad can drive and be the sane person in the house. But I dont think DH would go for that idea *sigh*

ETA - not to mention it would be cheaper for us to fly the inlaws over rather than pay for 3 kids to fly if that makes sense? I suppose though I could look at getting kids into daycare over there for some of the days we are gone.