I also make up a trail mix with Bob's Red Mill coconut flakes, a few Craisins, almonds, pecans, walnuts, and some pumpkin seeds. This is high calorie, so go easy on how much you eat, and too many nuts or coconuts works like a laxative! I never use peanuts or peanut butter because peanuts are very prone to molds, and can have a lot of micotoxins. A good substitute for peanut butter is Sunbutter, made from sunflower seeds. It's excellent with celery sticks since we don't eat crackers or bread.
If you have access to an egg, any kind of oil and a microwave, you can bring premade low carb baking mix and make Mug Muffins in your condo or even the resort food court. I make ours in a ceramic mug or a bowl. My baking mixture, which I bring premixed in a ziplock bag, is a Tablespoon each of golden flax and coconut flours, a half teaspoon of baking powder, and a teaspoon each (optional) of sugar and some kind of spice. Mix one egg and one teaspoon of oil (butter, coconut oil, etc) into the flour mixture. Stir it all together inside your mug or bowl and microwave for one minute. Instant muffin in 60 seconds!
Last trip we spent a week at Boardwalk Villas and had a full kitchen. I discovered that cream and eggs were relatively cheap at onsite Disney stores, so we had real cream in our coffee and bought eggs for breakfasts and mug muffins to take to the parks for snacks.
I still had leftover eggs and baking mix when we switched resorts and stayed at Port Orleans, so we made mug muffins at the food court. BTW, this same receipe works in our Belgium waffle maker. Just add a half a small packet of unflavored gelatin to the mix, otherwise the waffle is a bit crumbly. With the gelatin it's just like a normal waffle. Light and delicious and gluten free.