Anyone using roof racks on a S60? We have an 850 now and am considering buying a S60 (when the awd version becomes available). We do a lot of camping and canoeing/kayaking in the summer and would like to be able to put bikes/boats and/or a car top carrier on when needed. With the slope of the roof I wasn't sure how well racks would work. Wouldn't keep them on all the time -- just for weekend trips and vacations. Thanks in advance.