Enjoying a vacation in the Smoky Mountains. I have ceramic brakes on the front, and so far they have performed perfect throughout this area. How hot is reasonable? Drove down the main park road into Gatlinburg and stopped at the bottom. My C2500 had about 800 lbs of passengers, 50 ils of luggage, and 3/4 tank of fuel. Rotors were almost 500 degrees, and calipers were almost 400 degrees. Brakes worked fine, but am I overworking them? Thanks.