How to Stay Consistent with Your Diet During Travel

I am about to head off on a three week trip across Europe and I am terrified of ruining my progress. I have been following a very strict keto diet and I have lost fifteen pounds so far. I really do not want to gain it all back while I am enjoying myself in Italy and France.

How do you guys handle staying consistent with a dietary restriction while you are traveling? Do you bring your own food or just try to make the best choices at restaurants? I am planning to bring some beef jerky and nuts but I am not sure if that will be enough.

Do you have any tips for staying active while on the road? I am going to try to hit the hotel gyms but I know it will be tough with a busy itinerary. I would love to hear any success stories of people who managed to stay in shape during a long vacation.