We pulled the cushions and use 3" ThermaRest self-inflating camping pads in our 2011 Hawk. 25" wide, I believe... Two of those side-by-side fills the queen size space and stack easily under the dropped top with room to spare. We use a 1/2" thick yoga mat to level the sleeping surface that slides out. We like a soft but conforming mattress (the one at home is a premium solid latex foam) and these feel like a real bed. Easy to adjust depending on how weary we feel, and never feel like we're on a board. Super light weight since we're hauling in an F150 5.0L V8.
They're really too heavy to hike with, but can easily do double duty if we ever need to use the tent again, want to lay out watching the stars on a trip, or even house grandkids for a sleepover.
Zanshin,
Is this what you are using:
http://cascadedesigns.com/therm-a-rest/mattresses/camp-and-comfort/neoair-dream/product
Sounds like a good solution but the cost is more than new foam pads.
I'm definitely using a 1/2'' mat to level out pull out/cab section.
Here is a solution for bridging the gap between mattresses:
http://www.bedbathandbeyond.com/product.asp?SKU=12184352
2003 Tacoma 4X4 - 2007 FWC Eagle shell
2006 Tundra Double Cab - 2015 Hawk - side dinette, silver spur interior