I have a tuned, weight loss, 2008 Duramax with 188k miles. Thinking of buying a gooseneck to tow my Ineos Grenadier and a CFMOTO Uforce U10 XL UTV on Colorado then MOAB. I think that will be about 8k lbs before I add all the tools, coolers, etc. plus going up into the Rockies then running to...