Heat oven to 300°F. In large bowl, mix corn chips, pretzel twists, oyster crackers, peanuts and pumpkin seeds.
In small bowl, mix remaining ingredients. Pour butter mixture over corn chip mixture; toss to coat. Spread in 2 ungreased 15x10x1-inch pans or large roasting pans.
Bake 25 to 30 minutes, stirring every 10 minutes, until peanuts are golden brown. Cool completely, about 30 minutes. (Mixture becomes crisp as it cools.)