I have a 2008 Toyota Camry (Mid-size car) and would like to carry two canoes: 15 ft, 28" wide, 30 lbs; 16 1/2 ft, 36: 50 lbs. The rack (Yakima Q-Tower with a 66 inch bar instead of the standard 58 inch bar) is rated for 100 lbs and Toyota states the roof will support the weight. I'm wondering...