Re: How do I park this thing?
Get some empty milk bottles or big pop bottles, spray paint them red, fill them with water, buy two inexpensive little Family Radio's and give one to your wife, take the water bottles, wife and radio's to a big parking lot on a Sunday afternoon when it is deserted, set the water bottles up in a measured distance of width and depth, turn on the radio's and make sure they are working, tell you wife to stand where you can see her in the rearview mirror, and then try backing from different angles into the space between the water bottles. The wife will direct you if you get to close to one side or the other. And the trick about the hand on the bottom of the wheel works, only it is a little more difficult than doing it from the top of the wheel and just taking time to learn which way the back of the trailer is going to go. Learn to use your mirrors and adjust them so you can see the rear of the trailer when it swings.
Another thing you need to be aware of is overhead tree branches or building overhangs. And don't get to close to the water or sewer hook-up, leave yourself room to do the connections. And if you are not sure, CHECK BEFORE BACKING!
If you are patient and take your time you will be backing like a pro, unless of course you arrive early and a lot of people are watching you back into your campsite, then you are going to be all thumbs and look like a novice. But just remember, they did it too.
And since you are a newbie I will give you another suggestion. Get a three ring binder, not to big, put some plastic page protectors in it, and then make up a checklist for you and your wife to go over before you pull out from home or from your campsite. Eventually you won't have to use it but until you don't it is a good way to keep from knocking your tv antenna off, leaving a refrigerator door open, loose items on the counter, a sway bar not tightened, etc. etc.
You can also make a little scrap book of places you have visited and might want to visit again. And you will find things that your brought with you that wound up just taking up space and adding weight that you won't bother with on your next trip.
Hope you have a great adventure.
Good luck.