Well done @Orlandointhewilderness!
JaceLancs this time, for me, the key is military-style preparation and I wonder if that could be really helpful for you, too.
If I am going somewhere, I often pack a SW-friendly picnic if I'm not sure what the food will be like. So something like, say, steak and rocket salad. Then I can eat something that pretty much stays fresh all day. If you are GF no one is going to bat an eyelid if you ask breezily for a plate (or just whip out a lunchbox!). I'm guessing if lunch is sandwiches it's not too formal anyway.
Then, I keep a bag of almonds in my bag and have a small handful and some water as a snack as my HEXB rather than having to fork out if I'm hungry.
Also if you are in hotels, don't be shy about asking for things to be cooked/prepared in a different way. Restaurants are definitely trickier as the kitchen is under greater strain but hotels are better set up (and frankly more flexible) about asking for changes. All the better if you can ask in advance.
Other than that, I save all my syns at the moment for evening/weekend when I'm less likely to be the person cooking.