When we bought our 19rr we laid on the matress and just gave each other "the look". Got it home, opened the back gate and out it went. Its leanin up against the wall in the MIL's garage if anyone is interested. Cheap too!
We went to Target and picked up one of the deluxe inflatables with some kind of memory foam - so when you roll over you don't bounce your bed-mate off the bed, and its great. Got the internal, automatic pump with a remote too. ($200 or so) Its almost twice as high as the stock but not high enough to make it crowded for headroom in the bunk area. Night and day difference. It hangs over the end a little more so we have to scoot it up from time to time. Put some of that rubber cabinet webbing under it and it helped greatly with the scooch factor. Deflate and fold up after the season (or weekend) and its down the road you go!
One of the best mods we've done frankly. And you don't wake up all grumpy b/c you slept horribly too! Always a good thing when yer in a 10x20 box for the weekend!
...money damn well spent i say