The problem you'll have is with payload when you're all loaded up. I say that as I ran into the same thing with my Yukon XL Denali. No problem pulling or stopping the load. But when you add in the WDH, battery(s), propane, fresh water, cargo, food, camp chairs, fishing equipment, bedding, clothing, dishes, pots/pans, bbq, and much more that you will end up taking on your trips, expect your tongue weight to climb dramatically.
From the factory, you're at 620 lbs. That includes the weight of none of the above. When you're loaded up and ready to "go camping", expect to add a few hundred lbs to your tongue weight. It happened to me. And if you traveling heavy with 700 lbs in your TV (I had much less), you'll be over the payload capacity of your Denali.
A trip to the scales is what's required in your case. I did and ended up moving up to an appropriate TV with nearly double the payload. I get better MPG's now towing too. And the kids/wife can bring anything that will fit in the bed of the truck or trailer.
Everyone's happy.
Good luck and safe travels.