Hi Sally,
I vote for the daycare bus to drop her off and some non-uniformed smiling person (or a policeman!!!) escort MIL into the building. She's a happy camper on the bus and may be happy to see the interesting new place. Have her belongings there already and you be nowhere near that part of town so you cannot appear to be the way home.
When I took Mom the the locked unit, I was asked to tiptoe away and not come back for a week to give her time to become used to the new surroundings. I could call and ask about her but not see her.
I'll keep thinking about it!
Hope FIL can be moved to another NH so he'll tolerate it better. I agree with Wannabee that FIL must pay his way and MIL's way, too.
I'd live to see your new hair color! It sounds lovely. Was Alan surprised?!
Off to breakfast ...
Hugs - Barbara