Looking at the floorplan, I wondered if something above the foot of the bed would work. Looking at pictures, I see a window right there. I would bet a heavy rod mounted there would let you hang some picture, but it wouldn't be the most aesthetically pleasing.
2018 Ram 3500 DRW/crew cab/long bed/4x4/4.10 gears pulling a 2017 Spartan 1245 by Prime Time
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| Was a Fulltime Family for 5 years, now we're settlin' down for a spell