If somehow you could extend the rear of your camper to the angles shown, you'd be miles ahead; a little play on words.
Welcome! In your situation, I might have looked for the mid 80's Toyota van which could probably get near 40mpg stock if driven correctly.
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06 Chev MonteC JG#24tribute car 30mpg 00 Honda Insight 63MPG 98 Buick Park Ave3.8 33MPG 89 Toyota Corolla wag 60MPG so far 81 VW Rabbit diesel pu 50MPG+ 80 Mercedes 240D stick 30-ish 90 vette 6-speed,29ish 07 Honda ST1300 55MPG 83 Honda 650 GL 64MPG 19 Suzuki dr200 88MPG23 HondaGrom?+Tow K10D Sub 26mpg NEVER,NEVER GIVE UP!
PUMP THOSE TIRES UP!
DRIVE IN YOUR SOCKS FOR SENSITIVITY!!!!!!!!!!!!!!!
SLOW DOWN AND SMOOTH UP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!