I agree with Bruceh but I'd carry it a few steps further. Try everything:
Leveling system (if you have one)
Shower and all faucets
Awning (yes, open & close it)
Partially fill all tanks (fresh, black, grey)
Use procedures you will find either in your manual or here in the forum to sanitize your fresh water tank and plumbing.
Hook-up your dump hose (even if you don't have a place to dump into) and practice dumping your black and grey tanks (remember they're just full of water). Believe me, if you have never done this it is best to make mistakes now with plain water than with the mess that will come out after a week or so of actual use.
In essence, I'm telling you to actually try all systems, and functions of your new coach now. Set up as if you were in a camping spot and try everything. Finding any problems now will go a long way toward making your first camping experience a great one
Go over backing with your wife so that you are both insync on the process. Not trying it for the first time in the dark on your first night of camping.
The more familiar you get with all of this now the fewer problems and learning issues you will have later. This is especially true since you are home and can readily deal with any problems.
Finally, go out and do it!!
Have fun and a hearty welcome to the great world of RV'ing.