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trailer
The boat tail probably won't help until the nose of the trailer is corrected.
The lack of side radius is costing you up to 18% mpg,and the gap between trailer and truck another 8% mpg.
If she had a nose like the early Airstreams you'd see up to a 26% improvement.
The 'Bullet' trailer was compared to one like yours,behind a Town and Country minivan.
A 16',2,990-lb trailer like your's got 11.8 mpg @ 60 mph.
The 32',5820-lb 'Bullet' returned 13.2 mpg at same speed,same tug.
And the 'Bullet' nose is in no way ideal.
The side radius has been reported as a source of sway.Fibrelock Fabric Ltd.,England,who marketed an inflatable 'Airstream' nose (trailer dome) in 1982 claimed that their unit reduced pitching and snaking.
The worst part is that your trailer nose will exhibit the highest drag increase in a crosswind,whereas an Airstream will exhibit the lowest.And it's windy most days.
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