G'day Gai Le Douche (fuarrrrk I love your user name),
I'm in a very similar situation mate.... I travel a fair bit, I'm typing this in a hotel room. My eating habits when I'm away are a little unusual. My company will pay for brekky and dinner, but not lunch.
The hotels always put on a great buffet breakfast.... I load up on HEAPS of bacon, eggs, muesli etc. This keeps me full until dinner, so I don't have to pay for lunch lol. I usually have a steak in the evening. Just finished a beautiful wagyu sirloin steak.
So even when I'm away, I still get a shitload of protein. I actually have a tendency to put on weight when I'm away, so I have to make a conscious effort to not pig out too much. It's too damn easy to do it when the company pays for it.