I am traveling with a group of friends (9 adults, 3 children), and we are looking to book one or two hotel rooms for just one day from ~8am to 5pm, between our train ride back from xian, and while we wait for our flight out of Beijing airport. Because we have young kids that need to take a nap, we are looking into the possibility of booking one or two rooms (suites? if possible?) for 9 hours, so that we can have a place to take a shower & rest before getting on the plane.

what hotels near Beijing airport have airport shuttles, and how can i make an "unusual" reservation like this?