Preheat oven to 350°.
In a medium mixing bowl, combine graham cracker crumbs, 1/4 c. sugar, 1/4 c. brown sugar, and melted butter; mix well.
Divide evenly among 24 muffin tins (approx. 1 1/2 Tbsp. each) and press down firmly. Chill while filling is being prepared.
In a large mixing bowl, combine pumpkin, 1/2 c. brown sugar, eggs, cinnamon, nutmeg, ginger, and salt. Mix well.
In a separate bowl combine softened cream cheese, 1/2 c. sugar, and vanilla. Blend until creamy.
Combine the pumpkin mixture with the cream cheese mixture; blend until smooth.
Scoop 1/3 c. filling into each muffin cup.
Bake at 350° for 25-30 minutes or until centers are set.
Cool on a wire rack; refrigerate, covered, 2-3 hours or until ready to serve.