Preheat oven to 350 degrees. Combine the oats, flour, brown sugar, salt and baking soda in a large bowl and mix. Add the melted butter and mix well.
Divide the mixture in half and press one half into a parchment lined 13x18 standard half size sheet pan.
Bake for 10-12 until light brown.
Melt the caramels and half and half in a microwave safe bowl. Microwave on high in 1-minute intervals, stirring in between until smooth.
Reserve about 1/3 of the caramel mixture and pour the rest over the oatmeal mixture. Sprinkle chocolate chips and pecans over the top.
Crumble the remaining oatmeal mixture on top and drizzle with the remaining caramel.
Return to oven and bake for 12 more minutes until brown. Cool, then cut.