2001 GMC Yukon 1500 as TV

Great info from everyone and much appreciated! The suggestion of not traveling with water in the tanks is very helpful. I've still assumed at least 1 full holding tank, in the event that we don't have hookups at some point, and also gives me a cushion. I have included 700 lbs of "stuff" in my calculations - which is in addition to water, propane, batteries and WDH. I understand this is a swag, but believe it's erring on the high side. With this estimate, I'm at 78% of SUV towing capacity (6,066 / 7,800) and this assumes tongue weight is not distributed to TV. So I'm under the 80% guideline, but my overall GCWR is at 89% (11,508 / 13,000). How much of a concern is that? Oh - the SUV is 2WD. And our plans include a trip from TX up to WA to visit kids/grandkids, so I won't be able to stay on flat terrain. Think the Yukon can handle it? I know I'm pushing it. Just can't stand the thought of buying a TT AND a TV at the same time. Lots of cash to shell out and I love my pampered Yukon!