I enjoy cheese, cured meats and antipasti vegetables (artichoke, asparagus, olives, pickles), at these events. Perhaps you could bring them in addition to whatever you are providing. You could also bring some of these (as emergency foods) and only bring them out if there are not other suitable options.
Depending on your relationship with the host you might want to ask, “Hey, I have some food restrictions for health reasons at the moment, will there be a cheese platter, cold meats, olives? (insert food option you would like to have). If not I am happy to bring some along.”
The other strategy that Megan Ramos suggests before a big food event is to eat a good fatty meal before, so you are not hungry. Eggs, avocado, bacon or another meat.
Unless there is another reason to restrict wine you can have dry white and red wines. If they are dry they are likely to have less sugar and carbs. So you could aim to have a glass or two. You could space them out with having a sparkling water with lime going through out the night.
Hope you enjoy the night!