Make some gomashio using the ratio of salt appropriate for your condition, climate and travel plans before you go and take that along as a healing condiment. You can add them to miso soup, vegetable dishes or eat on their own. If you do eat fish then it is fairly easy to find something straight off the menu at most places. Lately I have found that eating fish with vegetables is more balancing for me than taking my chances with a token vegetarian dish. Just be wary of too many fish based meals in a short space of time if you are sensitive to strong foods or have a tendency to become too yang and contracted.
Some people find fish balancing while travelling, others find it unbalancing.
The trick it to listen to your body and see how it responds. Some people balance fish with fruit and others with more vegetables or raw vegetables. Some people just find that it naturally balances out. In the absence of other grain products I ate a plain baked potato with the fish and steamed vegetables and felt surprisingly balanced afterwards. Most restaurants will have a fish of the day or fish dish on the menu.