Realize this is a bit old. When I was comparing frontal areas, my truck calculated as an effective 30 sqft. Adding camper total frontal area: narrowest ATC with 53" height was 38 sqft, soft top Palominos (like Rogue, 500, 1600) with 72" height (inc vent, so a bit apples and oranges) was 46 sqft, and at that time one of the smallest hard top campers TravelLite 690 for Tacomas (needed a 1.5" lift to clear 1/2 ton cab) was 49 sqft.
FYI- Width is important too though partially blocked by cab - but not all. Keeping height constant, the difference between ATC widths: narrowest 72"=38 sqft frontal area total tuck and camper; widest 84"=42 sqft.
Your mileage may vary.
