By far the closet Metro station to the Hilton ADT is Courcelles ( two short blocks) so the OP takes line 6 to Ch de Gaulle change to line 2 and two or so stops to Courcelles.
note the Hilton ADT is on Ave Courcelles.
Not sure if the OP is a HH member but as a HH Diamond I have turned up well before noon on four/five ocasions ( last time before 0900 am) and we were checked in immediately.
In any event the hotel will gladly keep your bags until you pick them up.
My party (of four) left four suitcases there for four days when we travelled outside Paris.
mike