Reese's cups are reliably clean. Hershey regular and almond bars are always hydro-free. Avoid caramels, tootsie rolls, Starbursts, chews, or filled candy bars like 3 Musketeers or Milky Way. If you must have a candy bar, 5th Avenue, Baby Ruth or Mounds are better bets, but by all means read the label. Old fashioned kettle potato chips and regular Lay's are usually ok, most other potato chips are loaded with it.
Tortilla chips vary tremendously.
Again, health food stores, and occasionally aftermarket food outlets, will have acceptable non-hydrogenated and sometimes organic alternatives. Pretzels are more reliable, but must be watched. Corn chips, Sun chips, bagel chips, sourdough chips and corn nuts are all hydrogenated. Some plain water crackers may be clean. Rykrisp are clean.