My husband and I are doing the Grand Circle in early October. We will be driving down Highway 12 from Torrey to Bryce (staying at Bryce for one night before moving on to Zion the next day). How long would it take to detour to Grosvenor Arch and is it worth it? We will be leaving Torrey at around 7:30 am and plan to make some stops on Highway 12 but no hikes. We are hoping to get to Bryce no later than noon.