Help Wanted, Ideas for Roving Food

I live in a world different from most, it seems.  Lets start with the general idea I am looking for.  I need what I am calling Grab and Go food.  It needs to be basically shelf stable in prepackaged containers, and yet things I can make up myself.  No 20 year old Twinkies here.  It needs to be as fresh and healthy a food stuff as I can manage in this situation. 

Now, specifics on this project.  We lead an incredibly busy life.  Not making us sound like something different than most, I do offer the opportunity to anyone who wants to come follow us around for a few days. 

My husband and I own a fledgling trucking company.  Currently we have a staff of the two of us, an office manager and one other driver. 

My mother and I are also co owners of another very local trucking company that belonged to her and my dad.  I manage it pretty much on my own with the help of 2 part time drivers, my husband as the back up, to the back up driver and my right hand in times of crisis.  Now, here comes the issue I have that brings us to my food blog.  Its the food....

The nature of both of these companies is that we get a call and drivers leave.  For the "regular drivers" this is a somewhat more planned thing but when they are out and another call comes, it is my husband who goes.  He has health issues that make me want to try my best to keep him around regardless of his not thinking about this issue much. 

I need food that I can premake, say over the weekends, have packaged in the fridge or shelf, that I can grab, stuff in a bag or ice chest and shove in his hand as he walks out the door.  There are days that he leaves and is gone for 5 hours.. and other days due to the nature of this business that he doesn't roll back in to home base for 24-48 hours and we really never know the ending answer until he actually drives back in.  

He has a nasty tendency to just forget about eating until he is starving and the picks up what ever he sees on the truck stop snack shelves to hold in one hand and drive with the other, or hits the truck stop restaurant.  Yeah, that brings its own trouble.
So, hopefully you see my dilemma. 

Any thoughts would be much appreciated.