The best advise to everyone with a coach is to drive VERY slowly when turning on un even ground, it only makes common sense that the faster you drive the more the flex and twist will happen. This happens with many makes of motorhomes, not just Travel Supreme...
I had my windshield pop out 6 times. I happened upon Simpson Glass, in Las Vegas. He is associated with Findlay RV, not too far from Sam's Town Casino. He is one of the few guys who can adequately repair the problem by re-routering the frame of the windshield so it sits deeper in the frame. cost is about $1700 I was glad to pay it. Only one side popped out, but he fixed both sides. I have had no problems since. He may be able to refer you to others who know how to do it. good luck
Rich