There is lots of varied advice on this website. It may be difficult to find in one place but your could start by doing a search using the words "new owner advice". Go to the "Search" button above, go to the bottom of the drop-down menu to "Search site/Google" and enter your words.
I really didn't fully understand the extent to which I could have customized my new Scamp. I agree with all of Doug's suggestions except for #2. While you may want a door in the lower closet we found that a "pull-up" bottom shelf in our custom installed shelving system works well to access this wheel well area. There we put tablecloths, toys, pie iron, bench pads, and a large net bag for laundry. I would have chosen sturdier curtain rods and bars or asked to leave the wall bare so I could install a wrap-around curtain rod. The
Happier Camper has a sturdy shades on it's window which cannot be changed. It's efficient, but as a "Glamper" I like the ability to change up the interior decor with curtains.
I ordered an exterior electric outlet which I never have used and others LOVE theirs.
We had chosen an ice chest over a
refrigerator for our Scamp. This means you have to find ice every few days. This is becoming more difficult as the years pass by as you can't get blocks of ice at gas stations nor grocery stores very often. Also, the door does not have a locking mechanism. After camping in a rental RV on vacation in Alaska we fell in love with the
refrigerator. We boondocked most of the time and the
fridge performed magnificently, had no motor sounds and automatically chose whether to run on
propane or electricity. Note: I don't know if the Scamp refrigerators have a lock or not.
So, basically, customizing is very personal and you really don't know what your preferences are until you camp with your trailer.