Hi
@mantha81.
When I do long-distance driving I love having a store of cold-cuts meat on hand - literally in my hand when it comes to sausages. (If finances allow, and mostly is - high quality high percentage of actual meat, and I have my favourites.) Messier finger food is spiced meats, like marinated and baked chicken wings and nibbles are great too, but I need to be picnicing for that, with a bunch of wet wipes and paper towels on hand for cleaning up to keep the steering wheel good. Those are my fave travelling foods.
My next travelling-food fave is homemade keto pizza, as in the fathead pizza recipe (made with cream cheese, almond flour and lots of mozzarella cheese). I have meat-lover toppings, and capsicum. More cheese on top. I make my own marinara sauce for the red sauce on the base.
Mixed salted nuts are great too. But again - for picnic-ing, due to salt on the hands and needing to wash them off.
I'm dairy tolerant, so cheese and keto crackers are a staple, but I prefer not to eat it on the road, due to crumbs. Stopping off at a beautiful spot to eat cheese and nuts can be very pleasant.
I have three different sized chilly bins for different distances of driving. Packing these is a major part of prep for a big driving day. (Also for my sparkling water, and caffeinated bubbly drinks no sugar for if necessary.)
You would need to know how your husband's artery health is affected by dairy though, I guess? Does he know?
But meat and high meat percentage sausages are very filling, and well digested by the stationary body (in the driving seat). My understanding of high protein food, with healthy fat as part of the package, is, that there isn't excess energy left for storing as body-fat on him and will be used by him to run that body much like the diesel or petrol and oil will be running the lorries!
Meat, fish, seafood, and veg to his liking - my understanding is you can't go much wrong with that. Clean energy.