WELCOME Gumshoe!! Like your forum name!
Practice, practice, practice backing your rig up. I used cones and an empty parking lot. Some campgrounds are pretty tight.
Buy yourself a walkie-talkie set so that your parking 'guide' can talk you in as they are always going to forget that if they can't see your mirror, you can't see them!
Take it slow. You won't be able to go the same miles-per-day that you can in a passenger vehicle.
Keep a big distance between you and the vehicle in front of you. Your breaking time is considerably expanded.
Each time you stop, check your tires and especially make sure that your trailer break plug is still secure. I use one of those tiny bungie cords and wrap it around to hook on the plug eyelets. I have had it come loose on me, luckily I was going slow and was able to use only the TV breaks. Now I check it before I get on the road.
Carry and extra gal. of coolant for your TV. It will heat up more, towing, and is a good thing to keep on hand.
Be aware of semi's passing you. The faster they are going the more you are going to feel it pull on your TT.
Have a check list (and use it) for setting up the TT (at your site or at home) and tearing down. It really helps as you won't forget your antenna up, things like that.
That is all I can think of right now. Enjoy your new rig!! It is a wonderful, new, world opening for you!