I am preparing for a 3-week trip to Croatia, Bosnia, Montenegro, & Greece. For a couple reasons (fending off migraines and a peanut/nut allergy that keeps me on my toes while traveling) I would like to pack a large bag of trail mix (cranberries, pumpkin seeds, almonds, and possibly other dried fruits). I know I can probably replenish this stash of food midway through my trip, but I am wondering at what point I would encounter customs barriers. I also know that I can navigate Greek food with my nut allergy. I am less certain about Croatia and Bosnia.
I know that there are limits to fresh produce and meats traveling across borders. Does this apply to dried fruits, seeds, and nuts? Does anyone else have experience packing a stash of food for their multi-week travels?