Unless something has changed, one of the limits you will run into is the 1,000lb tongue weight limit. The hitch on the Yukon XL is integrated into bumper and not replaceable. It flexes significantly when using a WDH. We towed for 3 years with a 2008 Yukon XL Denali (~7000lb TT) and never felt completely comfortable. The Denali had 1500 chassis with luxury ride, perhaps your Yukon is a 2500 model? The LT tires will help tremendously (we never changed the factory tires). I think it might tow those trailers, but you may not be comfortable, especially in wind.