Looking to buy my fourth PU truck camper. I've had both hard side and pop-up types in the past. Back when 4WD trucks were relatively affordable, I'd take them into extreme areas off road. After destroying a hardside with this type of travel, I bought a pop up. But now we use ATVs to get deep into the woods and the $60,000+ truck stays on the "safe area"....There is no issue with the campers height any longer.....My question, how much difference is there, real world, in MPG for a hardside VS a popup. Does the extra few inches of height really make that much of a difference (Weight being equal) I'm currently using a RAM 2500, 6.4 HEMI, short bed, 3300# Payload....My own comparisons would not be accurate as these three previous campers were on three different pickup trucks. Thanks