Hi
Anything that takes you through the routine of hitching up, driving a ways and setting up camp is good practice. Any night you spend in the trailer will have you spotting things you might want to bring along next time. We made a lot of shopping trips for stuff that cost < $10 each to get the setup "just right" ( = until the next trip)
Truth be told - I that shopping process started with AS parts at the dealer's "store" before we ever got the trailer out of the lot ...
There is a lot of "this bin fits here, we need a bin for that" sort of stuff. You just will not be able to work it all out without trying. It's not a lot of money, it's not even a lot of time. It is the kind of optimization that will make life much more simple in the trailer.
There's also running through the process of working the hitch, backing up into a space, and all the fun with hoses. None if it is crazy difficult. Doing it a couple of times in low pressure / take your time settings is by far the best way to get familiar with all of it. "I forgot to do this" is far less critical when you catch it quickly. It then becomes part of the story. (Don't ask about our adventures with the keys unless you have a *lot* of time
)
Bob