Love everything MarciaB mentioned! (MarciaB, I feel like we could be friends!!)
Moving from rental to rental is a hassle, and there's always another bag of stuff somehow after each place! Hi, new book I had to read, bottles of wine given to us as gifts, beanie/scarf/wool socks I had to acquire, presents people send us (WHY?!?! Dear lord if there's anyone in your life who spends most of the year on the road, do not mail them a 10 pound candle bigger than my head or any other ridiculously unnecessary item...give them the gift of nothing... or a gift card if you must).
Our road trip food situation in the back of the car is:
1 cooler
1 large milk crate for dried bulk goods/spices/oils/etc.
I used to also bring along my favorite skillet, 1 chopping knife, 1 pairing knife, scissors (I'm a leftie) in addition to the slow/rice cooker and vitamix but I left them at home this time since I knew the hotel we would be staying at had sufficient gear. But alas, I forgot how truly awful other kitchens are. For example, the cutting board here is the size of a small dinner plate! Yet, they have an electric kettle, a large counter top coffee maker, grinder, chemex, and scale for coffee... *shakes fist* at whatever hipster thought this was a good idea. Coffee situation is covered, cooking food, not so much. Oh, and like MarciaB, we also have a lot of tupperware with us. 1 giant suitcase is stuffed with our kitchen essentials.
The suitcase idea came after moving into a hotel in the middle of a large downtown city that didn't have parking on site/valet/not even a place to pull over and so we had to park in the assigned lot a quarter mile away. Doing that walk back and forth a half dozen times with boxes/bags was enough for us...
Don't mean to freak you out, Fi365, just thought you might want a realistic picture of what you'll need when going on the road. 1 suitcase per person is an admirable goal, but we're 2 people and have a subaru outback + thule case stuffed to the brim and none of it has been wasted/unnecessary/excessive. I think we have ~8 suitcases + 2 backpacks + 1 cooler + 1 milk crate. I think it would be pretty hard to do it in a Jeep without any other device attached. Unless you plan on never going anywhere cold - I think at least 2 of our giant suitcases are winter gear haha. We do fit all of our own personal clothing (minus winter clothing) into 1 suitcase each, but remember shoes, taxes/important papers, kitchen needs, toiletries, computers, cameras, work equip/gear, etc...