We did it!!!!!
Good Luck on your new Adventure, John and family. Just some thoughts from a slow learner. Which is what I seemed to be.
I would get a Trailer Life Campground book, or comparible, and find a nice campground not to far from where you live. A few hours drive. I would take a trial run to the campground and it out just to see what other campers have with them and how they are hooked up. Don't be afraid to stop and introduce yourselves and asked questions.
Have you ever backed a trailer before. Most people wind up with an "oops!" if they don't watch where they are backing. My wife and I finally bought two of those little "family" radio walky talkies. She would get out of the truck and watch me back on to the campsite and tell me which way I had to go and when to stop. If your trailer has a slide-out you can make sure you aren't to close to a tree or maybe an electrical box, water faucet etc.
When you get the trailer you might also consider getting some large bottles, milk or soda, and painting them red or orange. Then take them to a parking lot on a Sunday when no one is there. Look in the camping guide and find out what their average lot size is and measure it out on the parking lot. Then you can practice backing the trailer into your campsite. Nothing embarrassed me more than to have to pull up, back up, pull up, back up, etc. etc. while other campers were watching. They start wondering where you learned to drive.
A good rule of thumb to learn to back a trailer is to put your hand on the bottom of the steering wheel. An old trucker taught me this. When you turn the wheel to the right the back of the trailer will go right and if you turn it to the left it will go left. Then you can get use to backing with your hands in the normal position.
When you get your new trailer I wouldn't be afraid to asked your dealer to give you a starter package. Toilet tissue, chemicals, cleaners, etc. They are making good money off you and should make sure you are ready to camp in every way. Get a nice size white hose for your drinking water too. You can't use regular garden hose. And I would buy and extra 25' of electric cord that plugs into your rv connection. And a water pressure regulator.
If you need any more advice don't hesitate to ask. When it comes to camping I have done just about every stupid thing there is. And I ain't to proud to admit it. Like making up a tag that hangs on your steering wheel that says, "Did you put the television antennae down?" Don't be ashamed if you knock yours off, it wouldn't be a surprise to find a number of others that did the same thing.
I made up a check list that I filled out everytime I went camping.
One last thing, get yourself a pair of the wheel locks that go between the wheels on your camper. When you get it set up and leveled you can put them in place. They will make the camper feel more secure and reduce the rocking. Worth the money.
Have fun.