We have a "HappiJac" electric bed in our Work and Play 18LT. It is mounted across the trailer, and stores near the ceiling with our motorcycles under it for transport. They have a page here: http://www.happijac.com/products.php
. Somewhere I read they won't sell a complete outfit to an individual, but do your own research. The bed runs off 12v, so when dry camping, be prepared to leave it in one position or risk running your battery down moving the bed every day. Hope this helps.
2012 Ford F250 ext. Cab 4x4
2002 Jeep Wrangler Sahara
2008 Yamaha V-Star 650 Classic
2008 Work and Play 18LT