This thread could get long real fast. I expect you may be skipping additional posts by now, but here is my take:
You have the truck. You have the TT. No more planning is needed. The question is how can you use it? Is it safe?
Some posts recommend you load the TT and Truck. Yes, include all passengers and luggage. That is your starting point. Get axle weights and total weights. I use a local commercial CAT scale. You will not be welcome at most state highway weigh stations. You may need to weight twice, once with TT hooked up and once without TT to get tongue weight.
Next look at the stickers in the truck driver's door frame to get all the axle, tire, and combined weight maximums. If you are not exceeding any maximums you are ready to go.
Your driving experience will vary depending on the weather and the terrain. Slow down for safety. Forget that surrounding traffic is whizzing by. On one lane roads, periodically pull off and let your train pass.
I tow at 60 to 65 mph. My TT is not as close to limits as I guess yours will be. I am retired and not in a great hurry to get there and back by Monday morning. Gas mileage is awful. With a 20 mph tail wind I can get the same gas mileage when driving at 75. Cross winds and head winds are more common and have the opposite effect. Snow, ice, and even rain will have an effect. Slow down in all cases.
Safety wise, slow down! Reduced speed solves many issues. Speed and a heavily loaded tow vehicle kills! If towing seems uneventful and boring, that is the way you want it. If you want to "get there fast and then take it slow" leave the TT behind.
Don't surrender to the urge to get there faster. The truly heart pounding emergency maneuvers come at rare and unexpected times. You need reserve distance for stopping and swerving safely. You may not get a second chance.
I wish you good luck and happy trails ahead!