I am looking for a good aftermarket set of both crossbars and roof rails. I like Thule but when I check there website it looks as if they only have crossbars that fit into the factory mounting holes. Is this correct? Can someone help me determine which is the roof rails and crossbars that fit into the factory mounting points? I would like for the crossbars to be able to hold more than 100 pounds as we are going on a vacation this summer and are going to have 5 adults and one child in the vehicle with us. Everything needs to go in a cargo bag or box for a more comfortable ride. I was worried with that much luggage driving at highway speeds the factory roof rails wouldn't be able to handle it. Thanks for any help.