I agree with everyone that nuts, dried fruit, cheese, and crackers go a long way right now. Plus, there is such a wide variety in each catetory--almonds, cashews, peanuts, walnuts, sunflower seeds; raisins, apricots, cherries, pineapple, apple slices; string cheese, cheddar, mozzarella; saltines, graham crackers, oyster crackers, cheddar crackers.
Since you have access to a fridge, I also love snacking on strips of cold grilled chicken. Fruit leathers are good for a quick sugar boost. And, of course, the easy fresh fruit and vegetables like apple slices, bananas, baby carrots, chopped cauliflower, celery sticks, cherry tomatoes; you can pair them with all kinds of dip like sour cream, salad dressing, cream cheese, chili, nut butters, hummus, salsa.
Do you have a Trader Joe's near you? I love them for healthy snacks.