A camping journal can also be useful to write down stuff while you are out and think "I shoulda brought that".
Also, expect to forget stuff and miss something, and if you are "Emotionally" prepared for it, it won't be as frustrating as it might be.
As far as wheel choks, think about how long you will be there, and if you plan on going anywhere. When I camp, the last thing I want to do is get in my car or truck and drive somewhere so I typically don't unless I have to. With this in mind, there is no need to unhook at all, and this will keep you secure. The only other reason to unhook might be if your site is on an incline and you want to level out a bit.
That leads me to another topic. Some people go ape about being perfectly level, but I prefer to have my head elevated so I will level my teardrop in this way.
Plan for trash. I got one of those spring loaded expand out trash "cans" and use it. Also, remember raccoons love digging through your trash, so hang it up, lock it away, or throw it away at the end of the day.
What I did before my first outing was think (OK dream!) about what I would do, and walk myself through the steps and write down things, I think I would need.
Most of all, don't stress over it, it is camping and you will come home soon... Don't forget the cell phone charger just in case
Have fun!