Take a close to home 2-3 night trip in your new unit before the long trip commences. It'll better inform you how comfortable you are in the space and what if anything you need to do to modify the interior.
No idea how large or the ages of your family is but now is a good time to start making ahead/prepping foodstuff from your regular roster. You'll have plenty of time on the trip to explore new foods during the weeks of the trip but I find a joy as the cook knowing the familiar is readily available whether we have a long day trip or I'm just feeling lazy.
Regard your toiletries with care. This is the time to look at multi-propose items. You'd be amazed at the amt of space toiletries can take up. For instance an all purpose bodywash/shampoo that ideally works for every family member; saves space and purchase time. I'm partial to the Bonner line since the price is right and it's readily available throughout N.A.. Also works well for different water temperatures.
Here's a link if you've an interest:
https://www.drbronner.com/DBMS/category/LIQUIDSOAP.html All of us use witch hazel as an astringent, aftershave or poison ivy soother when camping. Also edit down to one kind of deodorant/antiperspirant for everyone. Modify this thought to whatever toiletries you all feel comfy using.
Color coordinate your wardrobe and remove all special cleaning instruction items that might cramp your style. Yanno like that red t-shirt that bleeds...
For a 2-3 week trip I ensure that all clothing can fix in 1 weekend bag per person. That's because we wash clothing once a week @ a laundromat. In essence we travel w/ 1 week's clothing per person. You might want to up the clothing allowance on your trip but well I wouldn't if younger members are involved; saves me on stress and staring in the tween/teen mirror moments.
