Since you're in the Houston area, you have quite a few options:
1. Most RV dealers can set up your hitch and brake controller - I'm assuming your Tahoe has the trailer tow package with a receiver and 7-pin trailer plug receptacle pre-installed.
2. A hitch shop like Discount Hitch.
3. A trailer shop like Trailer Wheel & Frame.
3. Camping World in Katy.
At a minimum, I'd insist on a Tekonsha Prodigy brake controller or better. I'll let the "bumper towers" respond to the weight distributing hitch and sway control portion of your question.
2016 Ram Longhorn 3500 Dually 4x4 CCLB, 385/900 Cummins, Aisin AS69RC, 4.10
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