I think that there is a big difference between long journeys and a short weekend (or week) getaway - different mindset for sure.
We spent September on the road in our truck camper and both lost
weight, slept better, etc - all the stuff you said. We also cooked every dinner at the campsite, ate out every once in a while for breakfast or lunch.
Also hear you about stress. Once upon a time, I had a big important job with lots of stress. So much that I was clenching my jaw / grinding my teeth away at night. My Dentist wanted to fit me with a mouth guard to stop me from damaging my teeth further - but I thought a better solution was to get rid of the source of the stress.