Preheat oven to 350 degrees F.
Mix chex, pretzels and nuts in a large bowl.
Put parchment paper in 9x13 glass baking pan. Pour chex mixture in it.
Melt butter and honey together in a saucepan over medium heat until completely melted.
Pour honey mixture over chex mixture. Combine and mix several times to make sure it's fully coated.
Bake in oven for 13-15 minutes. Remove from oven and let cool slightly.
Add peanut butter m&m's and stir to combine. Let cool completely. Fill in bags and enjoy on your family road trip!