In order to watch TV in bed as mentioned elsewhere, we bought a couple of wedge pillows. I think these are normally used for therapeutic exercise purposes. There are different thicknesses available and we got 8" (and 24x24". They make the back vertical so you can use a standard pillow or two and be comfortable.
We'll probably have to toss these on top of the trailer at night since we've run out of spaces to store crap. Creative suggestions welcome on this issue.
