I think the hotel nearby is the Marriott. They did have rooms set aside last year for salegoers. Not sure about a shuttle though, but it would be super if they'd offer it as the sale site isn't that far away. Too far to walk though especially bringing purchases back. The friend of mine who stayed there last year just drove their car over.

www.madisonchildrensmuseum.org will get you to the Madison Childrens Museum website & then click on benefit sale for more info.