I can add a tad for you, besides confirming what all here have already offered, don't really push yourself faster than the 65 mph range. I pull a ROO 233S with my Suburban which is a tad longer wheelbase than your Tahoe and what tend to "push" me around is just the big rigs passing or idiots speeding like the dickens and passing too close to me....they tend to make it feel as if the trailer is being "shoved" a tad sideways, but I think it is more my own mental freakout than any actual movement. I can say that the ROO front is rather "proud" and you are pulling a large wall down the highway so it ain't gonna feel like driving just the Tahoe alone. I am looking to upgrade my WDH (have one like yours) to the Equalizer System either this season or next. There are MANY folks out there and all over these forums that rave about the Equalizer setup. In either it or your current WDH, just make sure you have it set right, the tongue weight will make a HUGE difference in your experience. I have tried before changing the number of "hanging links" on the chain by 1....either adding 1 more or taking 1 more away...you can feel LARGE differences in behavior. Aim to get yourself as level (TV & TT) as you can and understand that what and how you pack will change that effort as well.
Finally, since your Tahoe is an 07, I am thinking you just have the 5 speed trans so your temp's are probably fine by my understanding, but you might just want to increase the service interval (oil replacement) on the trans as a result. My 12 Burb has the new Chevy 6 speed trans and all around Central Florida in the summer heat I tend to run 190-210 or so at highway speeds...which I keep to no more than 65 unless stuck in a sticky spot where I can't get to a safe gap and need to pass morons...which I will get to ~70 if I have to but I don't like to do that...typically 65 max and I slow down for un-respectful drivers to let them clear the road in front of me.
Ed & Chris
Josh & Jaclyn
2012 Suburban LTZ
2013 Rockwood Roo 233S