2014 Dodge Durango Towing abilities

We have a 2014 Dodge Durango V8 Hemi and tow a Keystone Passport Elite. My husband researched it on his own very extensively even though we were told the Durango could handle it. The passport is dry weight of about 5400lbs but it was the hitch weight that the husband really began to focus on. We do have a weight distribution hitch and we are right on the bubble of the hitch weight. We carry 5 of us and 2 dogs totaling about 650lbs. We've been out on 3 trips so far. We live in Colorado too and took it to Moab so up I70 through the Eisenhower Tunnel and Vail Pass. As far as power, the Durango seems fine to handle it. Of course we aren't blasting up the mountainside going 75mph but we aren't putzing along at 25mph either. Our last trip was to Iowa to visit family and it was windy! The anti-sway bar helped but the Durango did suck gas towing with the wind. But we don't expect great gas mileage towing anyway. So far so good. No major problems. We've been really pleased with how the whole set up is working out so far!