Hauled this up to the Santiam Pass for camping and got 21 MPG overall.
Truck is a 2017 Chevy Colorado 4x4.
Each quad is 500+ pounds. Trailer is probably 350lbs. Who knows the weight of all the camping gear that's stuffed under the quads and in the wheel wells. My guess is somewhere around 1-ton of stuff being hauled.
Truck pulled super smooth and had plenty of power.