I travel for work frequently. Sometimes I have the ability to cook for myself, but more often than not I eat out.
For breakfast, on the odd occasion when I'm hungry at that time of morning, I find a cafe where I can get a simple serve of bacon, eggs and avocado. If that's not available, I have a bacon and egg mcmuffin from McDonalds and toss the muffin.
I often swing by a supermarket or service station and pick up sliced cheese, salami and salted peanuts, to have as snacks or a meal depending on hunger levels.
My main meal for the day is usually a steak (no sauce, butter on top) or pork belly if it's on the menu. If there's anything that comes with the meal that is non-Keto, I ask them to remove it so I'm not tempted to sneak a bite. At first I was worried that I'd get bored with this WOE on the road, but far from it!