Hello everyone. I just purchased a tepui autana xl ruggedized for my family of 4 . Wife and I and two small girls . I have a 2015 ram 1500 crew cab with ARE z series camper shell and Yakima racks. I am kinda concerned about a weight issue. I see alot ov people put these on the camper shells all the time however the rating for shell is only 300lb and yakima 150. Am I missing something. My RTT weighs approx 250 and family combined apprx 500lbs will this mess my cMper shell up? Should I purchase a custom roof rack? If so what do you recommend? I really would really like to keep shell if possible . What are your thoughts/ opinions ?