Hi there.
My husband is a road warrior too, so I am familiar with the lifestyle and challenges you are facing.
Do you get per diem or are you expensing only a certain amount?
Do you always get a fridge in your room? If not, call ahead and tell them you need one for medicine.
Do you rent a car once you are where you need to go? If so, stop at the store on your way to the hotel.
How long are you at each job? My hubby can be places for about a month depending on whether it's an outage or something quick.
A lot of hotels now have grills, so that's something to think about in you could cook a bunch of food and put it in the fridge.
What about a small crockpot? My husband sometimes will buy a cheap one and leave it for the hotel.
Good luck to you.